Maria Aristizabal

Title(s)Associate Professor Of Clinical, Pediatrics
SchoolVc-health Sciences-schools
Address9500 Gilman Drive #
La Jolla CA 92093
ORCID ORCID Icon0000-0003-0588-1532 Additional info
vCardDownload vCard

    Collapse Biography 
    Collapse education and training
    University of California San Francisco, CACertificate in Implementation Science6/2022
    Institute of Healthcare Improvement, Boston, MACertificate in Quality Improvement Coaching9/2019
    Rady Children's Hospital San Diego, San Diego, CACertificate in Quality Improvement Leadership6/2019
    University of Missouri, Children's Mercy Pediatric Bioethics Center, Kansas, MOCertificate in Pediatric Bioethics5/2016
    University of California San Diego, La Jolla, CAMasters of Advance Studies in Clinical Research6/2015
    University of California San Diego, La Jolla, CAFellowship in Pediatric Hematology/Oncology11/2013
    Collapse awards and honors
    Prebys Foundation2025Prebys Leadership Award
    National Cancer Institute Division of Cancer Control & Population Science2024Featured as Grantee
    JCO Global Oncology Journal2024Recognition for “Top 5 Most Popular Articles Published in 2023”
    National Cancer Institute Center to Reduce Cancer Health Disparities2024Featured as Hispanic Investigator
    Pediatric Blood and Cancer Journal2024Recognition as “Outstanding Ad-Hoc Reviewer”
    Children’s Mercy2024“Alumni Spotlight”, Bioethics Center E-news
    American Society of Clinical Oncology2024Recognition for First Article Published Simultaneously in JCO Global Oncology with a Presentation at
    American Society of Hematology2023American Society of Hematology Guideline
    Pediatric Neurological Surgery Annual Meeting2023Best Oral Presentation on Global Surgery Award
    National Cancer Institute2023Featured in the nationally distributed Cancer Letter in Receiving NCI R01
    National Cancer Institute2022Featured at the National Cancer Institute (NCI) Childhood Cancer Data Initiative
    International Society of Pediatric Oncology2022Best Oral Presentation Award
    International Society of Pediatric Oncology2021Best Oral Presentation Award- Global Health
    National Cancer Institute2021Utah Advanced Course on Mentoring, Leadership, and Cancer-related Health Disparities
    NIH2020National Research Mentoring Network (NMRN) Grant Writing Training Program Scholar
    Colombian Academy of Medicine2020National Academy of Medicine Research Award
    NIH/Johns Hopkins Bloomberg School of Public Health2019Mixed Methods Research Training Program for the Health Sciences Scholar
    NIH2019Entering Research Curriculum Train-the Trainer Scholar
    NCI2019Center to Reduce Cancer Health Disparities National Minority Health Month Spotlight
    University of California San Diego 2018Hispanic Center of Excellence Faculty Scholar
    American Society of Hematology2018Best Capacity-Building Project, Global Capacity-Building Showcase
    American Society of Hematology2017Best Capacity-Building Project, Global Capacity-Building Showcase
    Mexican Consulate- San Diego2009  - 2011Recognition for Outstanding Leadership in the Mexico-U.S. border
    Government of Mexico2009  - 2011Recognition for Outstanding Leadership in Pediatric Oncology

    Collapse Overview 
    Collapse overview
    Dr. Paula Aristizabal is a pediatric hematologist-oncologist at Rady Children's Hospital-San Diego and an Associate Professor of Pediatrics in the Division of Pediatric Hematology/Oncology at UC San Diego. She completed her fellowship in pediatric hematology and oncology at UC San Diego and a Master of Advanced Studies in Clinical Research at UC San Diego.

    Dr. Aristizabal research interests include ethics, patient-provider communication and global health, with a focus on discovering the causes of pediatric cancer disparities and developing strategies to improve outcomes in racial/ethnic minorities and underseved groups. Her work has focused on the barriers to participation in pediatric cancer clinical trials experienced by Hispanic children and how social determinants of health, such as race/ethnicity, socio-economic status, health literacy, language, and acculturation, affect outcomes in Hispanics. She has also conducted global health projects on implementation of health services for children with cancer in underserved areas in Latin America, including Mexico and Colombia, to improve access to care, cancer surveillance and registration, and cancer disparities globally.

    Dr. Aristizabal is the principal investigator of several clinical research studies focused on implementation science, qualitative research, mixed methods, bioethics and quality improvement. She mentors trainees and junior faculty in diverse quality improvement and research projects, including medical students in their ISP projects.
    She is a member of the UC San Diego Moores Cancer Center Population Sciences, Disparities and Community Engagement division, the San Diego Clinical and Translational Research Institute, and the UC San Diego Dissemination and Implementation Science Center.
    In her clinical work, Dr. Aristizabal specializes in the care of children with leukemia and lymphoma. She is the Division's Quality Improvement Lead and chair of the Quality Improvement Committee.

    Collapse ORNG Applications 
    Collapse Faculty Mentoring

    Collapse Bibliographic 
    Collapse selected publications
    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help. to make corrections and additions.
    Newest   |   Oldest   |   Most Cited   |   Most Discussed   |   Timeline   |   Field Summary   |   Plain Text
    Altmetrics Details PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
    1. Achieving Language Justice in Pediatric Hematology-Oncology: A Multinational Perspective for Language-Concordant Equitable Patient- and Family-Centered Care and Research Inclusion. Pediatr Blood Cancer. 2025 Apr; 72(4):e31521. Ruiz J, Robles JM, Sánchez LM, Khan A, Lu AD, Marjerrison S, Morales La Madrid A, Aristizabal P. PMID: 39809720.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    2. Increased Early-Mortality in Children With Solid Tumors During the COVID-19 Pandemic in a Middle-Income Country. Cancer Med. 2024 Dec; 13(24):e70483. Ramirez O, Piedrahita V, Bolivar S, Grillo K, Linares A, Pardo C, Piña M, Suarez A, Portilla CA, Ardila J, Lotero V, Urcuqui LA, Trujillo A, Montenegro P, Bravo LE, Aristizabal P, VIGICANCER Working Group. PMID: 39711262; PMCID: PMC11803909.
      View in: PubMed   Mentions:    Fields:    Translation:HumansCells
    3. Multilevel challenges to equitable inclusion of children in trials when parents use languages other than English: A qualitative report from Children's Oncology Group's Diversity and Health Disparities Committee Language Equity Working Group. Pediatr Blood Cancer. 2024 Nov; 71(11):e31321. Santacroce SJ, Beauchemin MP, Pelletier W, Robles JM, Ruiz J, Blazin LJ, Aristizabal P, Orjuela-Grimm M, Hall AG, Kahn J, Kline C, Seif AE, Velez MC, Winestone LE. PMID: 39238140; PMCID: PMC12010362.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    4. Language, 6-mercaptopurine adherence, and relapse in children with acute lymphoblastic leukemia. JNCI Cancer Spectr. 2024 Sep 02; 8(5). Robles J, Chen Y, Hageman L, Aristizabal P, Landier W, Bhatia S, Wadhwa A. PMID: 39226220; PMCID: PMC11410191.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    5. Clinical trial recruitment of people who speak languages other than English: a Children's Oncology Group report. JNCI Cancer Spectr. 2024 Jul 01; 8(4). Beauchemin MP, Ortega M, Santacroce SJ, Robles JM, Ruiz J, Hall AG, Kahn JM, Fu C, Orjuela-Grimm M, Hillyer GC, Solomon S, Pelletier W, Montiel-Esparza R, Blazin LJ, Kline C, Seif AE, Aristizabal P, Winestone LE, Velez MC. PMID: 38889291; PMCID: PMC11272047.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    6. Let's TOC Fertility: A stepped wedge cluster randomized controlled trial of the Telehealth Oncofertility Care (TOC) intervention in children, adolescent and young adult cancer survivors. Contemp Clin Trials. 2024 06; 141:107537. Romero SAD, Au L, Flores-Ortega RE, Helsten T, Palomino H, Kaiser BN, Echevarria M, Lukas K, Freeman K, Zou J, Aristizabal P, Armenian S, Su HI. PMID: 38614445; PMCID: PMC11520196.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    7. Primary central nervous system tumors survival in children in ten Colombian cities: a VIGICANCER report. Front Oncol. 2023; 13:1326788. Ramirez O, Piedrahita V, Ardila J, Pardo C, Cabrera-Bernal E, Lopera J, Suarez A, Portilla CA, Narváez C, Rodriguez P, Castro X, Castro Á, Estupinan-Perico DI, Valencia D, Álvarez MDR, Fox JE, Bravo LE, Aristizabal P. PMID: 38505512; PMCID: PMC10949889.
      View in: PubMed   Mentions: 3  
    8. Social Determinants of Health and Informed Consent Comprehension for Pediatric Cancer Clinical Trials. JAMA Netw Open. 2023 12 01; 6(12):e2346858. Aristizabal P, Nataraj S, Ma AK, Kumar NV, Perdomo BP, Martinez ME, Nodora J, Liu L, Lee E, Thornburg CD. PMID: 38079173; PMCID: PMC10714248.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    9. Childhood Leukemia Survival in the US-Mexico Border: Building Sustainable Leukemia Care Using Health Systems Strengthening Models. JCO Glob Oncol. 2023 06; 9:e2300123. Aristizabal P, Rivera-Gomez R, Chang A, Ornelas M, Ramirez M, Tamayo G, Martinez A, Ribeiro RC, Roberts W. PMID: 37269343; PMCID: PMC10497272.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    10. Partnering With Patients and Caregivers in Cancer Care: Lessons From Experiences With Transgender, Hispanic, and Pediatric Populations. Am Soc Clin Oncol Educ Book. 2023 May; 43:e397264. Katz NT, Alpert AB, Aristizabal MP, McDaniels-Davidson C, Sacks BH, Sanft T, Chou CL, Martinez ME. PMID: 37200592.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    11. At the border: A call to action for health equity for children with leukemia. Cancer. 2023 04 15; 129(8):1159-1161. Aristizabal P, Thornburg CD, Young J. PMID: 36805948; PMCID: PMC10416232.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    12. Gene therapy preferences and informed decision-making: Results from a National Hemophilia Foundation Community Voices in research survey. Haemophilia. 2023 Jan; 29(1):51-60. Limjoco J, Calatroni A, Aristizabal P, Thornburg CD. PMID: 36469856.
      View in: PubMed   Mentions: 4     Fields:    Translation:Humans
    13. A Multicomponent Telehealth Intervention to Improve Oncofertility Care Delivery Among Young Cancer Patients: A Pilot Study. J Adolesc Young Adult Oncol. 2023 04; 12(2):241-249. Yang E, Dornisch A, Nerb L, Helsten T, Kaiser BN, Aristizabal P, Armenian S, Torno LL, Baca NM, Genensen MC, Su HI, Romero SAD. PMID: 35639102; PMCID: PMC10124175.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    14. The Problem of Hispanic/Latinx Under-Representation in Cancer Clinical Trials. JCO Oncol Pract. 2022 05; 18(5):380-384. Espinoza-Gutarra MR, Duma N, Aristizabal P, Segarra-Vazquez B, Borno H, Halbert CH, Simon MA, Velazquez AI. PMID: 35544652.
      View in: PubMed   Mentions: 17     Fields:    Translation:Humans
    15. Single-agent Bevacizumab in the Treatment of Symptomatic Newly Diagnosed and Recurrent/Refractory Pediatric Cervicomedullary Brainstem Low-grade Gliomas: A Single Institutional Experience. J Pediatr Hematol Oncol. 2023 01 01; 45(1):e21-e25. Sridhar S, Paul MR, Yeh-Nayre L, Khanna PC, Elster J, Aristizabal P, Crawford JR. PMID: 35426868.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    16. Improving vitamin D testing and supplementation in children with newly diagnosed cancer: A quality improvement initiative at Rady Children's Hospital San Diego. Pediatr Blood Cancer. 2021 11; 68(11):e29217. Shliakhtsitsava K, Fisher ES, Trovillion EM, Bush K, Kuo DJ, Newfield RS, Thornburg CD, Roberts W, Aristizabal P. PMID: 34286891; PMCID: PMC8463415.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    17. Disparities in Pediatric Oncology: The 21st Century Opportunity to Improve Outcomes for Children and Adolescents With Cancer. Am Soc Clin Oncol Educ Book. 2021 Jun; 41:e315-e326. Aristizabal P, Winestone LE, Umaretiya P, Bona K. PMID: 34061564; PMCID: PMC9126642.
      View in: PubMed   Mentions: 24     Fields:    Translation:Humans
    18. Assessment of Factors Associated With Parental Perceptions of Voluntary Decisions About Child Participation in Leukemia Clinical Trials. JAMA Netw Open. 2021 05 03; 4(5):e219038. Aristizabal P, Ma AK, Kumar NV, Perdomo BP, Thornburg CD, Martinez ME, Nodora J. PMID: 33944924; PMCID: PMC8097494.
      View in: PubMed   Mentions: 6     Fields:    Translation:Humans
    19. The Golden Hour: Sustainability and Clinical Outcomes of Adequate Time to Antibiotic Administration in Children with Cancer and Febrile Neutropenia in Northwestern Mexico. JCO Glob Oncol. 2021 05; 7:659-670. Gonzalez ML, Aristizabal P, Loera-Reyna A, Torres D, Ornelas-Sánchez M, Nuño-Vázquez L, Aguilera M, Sánchez A, Romano M, Rivera-Gómez R, Relyea G, Friedrich P, Caniza MA. PMID: 33974443; PMCID: PMC8162497.
      View in: PubMed   Mentions: 10     Fields:    Translation:Humans
    20. Theory-Guided Development of Fertility Care Implementation Strategies for Adolescent and Young Adult Cancer Survivors. J Adolesc Young Adult Oncol. 2021 10; 10(5):512-520. Dornisch A, Yang EH, Gruspe J, Roesch ER, Aristizabal P, Aarons GA, Helsten T, Takemoto MB, Romero SAD, Kaiser BN, Su HI. PMID: 33470879; PMCID: PMC8666795.
      View in: PubMed   Mentions: 2     Fields:    Translation:Humans
    21. Improving Pediatric Neuro-Oncology Survival Disparities in the United States-Mexico Border Region: A Cross-Border Initiative Between San Diego, California, and Tijuana, Mexico. JCO Glob Oncol. 2020 11; 6:1791-1802. Aristizabal P, Burns LP, Kumar NV, Perdomo BP, Rivera-Gomez R, Ornelas MA, Gonda D, Malicki D, Thornburg CD, Roberts W, Levy ML, Crawford JR. PMID: 33216645; PMCID: PMC7713516.
      View in: PubMed   Mentions: 6     Fields:    Translation:Humans
    22. Effect of a Daily Text Messaging and Directly Supervised Therapy Intervention on Oral Mercaptopurine Adherence in Children With Acute Lymphoblastic Leukemia: A Randomized Clinical Trial. JAMA Netw Open. 2020 08 03; 3(8):e2014205. Bhatia S, Hageman L, Chen Y, Wong FL, McQuaid EL, Duncan C, Mascarenhas L, Freyer D, Mba N, Aristizabal P, Walterhouse D, Lew G, Kempert PH, Russell TB, McNall-Knapp RY, Jacobs S, Dang H, Raetz E, Relling MV, Landier W. PMID: 32852553; PMCID: PMC7453312.
      View in: PubMed   Mentions: 15     Fields:    Translation:Humans
    23. Diverse populations and enrollment in pediatric cancer clinical trials: Challenges and opportunities. Pediatr Blood Cancer. 2020 11; 67(11):e28296. Aristizabal P. PMID: 32343877; PMCID: PMC8203427.
      View in: PubMed   Mentions: 9     Fields:    Translation:Humans
    24. Sociodemographic and clinical characteristics associated with vitamin D status in newly diagnosed pediatric cancer patients. Pediatr Hematol Oncol. 2020 May; 37(4):314-325. Aristizabal P, Sherer M, Perdomo BP, Castelao E, Thornburg CD, Proudfoot J, Jacobs E, Newfield RS, Zage P, Roberts W, Martinez ME. PMID: 32153233; PMCID: PMC7207243.
      View in: PubMed   Mentions: 8     Fields:    Translation:HumansCTClinical Trials
    25. Treatment of Recurrent Refractory Pediatric Pre-B Acute Lymphoblastic Leukemia Using Inotuzumab Ozogamicin Monotherapy Resulting in CD22 Antigen Expression Loss as a Mechanism of Therapy Resistance. J Pediatr Hematol Oncol. 2019 Nov; 41(8):e546-e549. Paul MR, Wong V, Aristizabal P, Kuo DJ. PMID: 30807395; PMCID: PMC7216755.
      View in: PubMed   Mentions: 13     Fields:    Translation:Humans
    26. Childhood cancer survival disparities in a universalized healthcare system. J Pediatr Hematol Oncol. 2018; 4(3):78-87. Ramirez O, Aristizabal P, Zaidi A, Ribeiro RC, Bravo LE. 2019;3(4):78-87. doi.org/10.1016/j.phoj.2019.01.001.
    27. The "Golden Hour": a capacity-building initiative to decrease life-threating complications related to neutropenic fever in patients with hematologic malignancies in low- and middle-income countries. Blood Adv. 2018 11 30; 2(Suppl 1):63-66. Ornelas-Sánchez M, Nuño-Vázquez L, Loera-Reyna A, Torres-Reyes D, Rivera-Gómez R, Sánchez A, Romano M, González M, Caniza MA, Aristizabal P. PMID: 30504206; PMCID: PMC6438274.
      View in: PubMed   Mentions: 3     Fields:    Translation:Humans
    28. Implementing a Childhood Cancer Outcomes Surveillance System Within a Population-Based Cancer Registry. J Glob Oncol. 2018 09; 4:1-11. Ramirez O, Aristizabal P, Zaidi A, Ribeiro RC, Bravo LE, VIGICANCER Working Group. PMID: 30241253; PMCID: PMC6223468.
      View in: PubMed   Mentions: 11     Fields:    Translation:Humans
    29. An overview of disparities in childhood cancer: Report on the Inaugural Symposium on Childhood Cancer Health Disparities, Houston, Texas, 2016. Pediatr Hematol Oncol. 2018 Mar; 35(2):95-110. Scheurer ME, Lupo PJ, Schüz J, Spector LG, Wiemels JL, Wiemels JL, Aplenc R, Gramatges MM, Schiffman JD, Pombo-de-Oliveira MS, Yang JJ, Heck JE, Metayer C, Orjuela-Grimm MA, Bona K, Aristizabal P, Austin MT, Rabin KR, Russell HV, Poplack DG. PMID: 29737912; PMCID: PMC6685736.
      View in: PubMed   Mentions: 15     Fields:    
    30. Medulloblastoma With Extensive Nodularity: Tailored Therapy in a Low-resource Setting. J Pediatr Hematol Oncol. 2017 05; 39(4):299-301. Aristizabal P, Burns L, Rivera-Gomez R, Levy ML, Roberts W, Crawford JR. PMID: 28267079.
      View in: PubMed   Mentions: 3     Fields:    Translation:Humans
    31. Addressing regional disparities in pediatric oncology: Results of a collaborative initiative across the Mexican-North American border. Pediatr Blood Cancer. 2017 06; 64(6). Aristizabal P, Fuller S, Rivera-Gomez R, Ornelas M, Nuno L, Rodriguez-Galindo C, Ribeiro R, Roberts W. PMID: 28000395; PMCID: PMC5608088.
      View in: PubMed   Mentions: 5     Fields:    Translation:Humans
    32. Factors associated with cervical cancer screening in a safety net population. World J Clin Oncol. 2016 Oct 10; 7(5):406-413. Heberer MA, Komenaka IK, Nodora JN, Hsu CH, Gandhi SG, Welch LE, Bouton ME, Aristizabal P, Weiss BD, Martinez ME. PMID: 27777883; PMCID: PMC5056332.
      View in: PubMed   Mentions: 11  
    33. The Centers for Disease Control and Prevention definition of mucosal barrier injury-associated bloodstream infection improves accurate detection of preventable bacteremia rates at a pediatric cancer center in a low- to middle-income country. Am J Infect Control. 2016 Apr 01; 44(4):432-7. Torres D, González ML, Loera A, Aguilera M, Relyea G, Aristizabal P, Caniza MA. PMID: 26775931; PMCID: PMC4818654.
      View in: PubMed   Mentions: 8     Fields:    Translation:Humans
    34. Factors associated with surgical management in an underinsured, safety net population. Surgery. 2016 Feb; 159(2):580-90. Winton LM, Nodora JN, Martinez ME, Hsu CH, Djenic B, Bouton ME, Aristizabal P, Ferguson EM, Weiss BD, Komenaka IK. PMID: 26444326.
      View in: PubMed   Mentions: 6     Fields:    Translation:Humans
    35. Temporal dynamics of inflammatory cytokines/chemokines during sofosbuvir and ribavirin therapy for genotype 2 and 3 hepatitis C infection. Hepatology. 2015 Oct; 62(4):1047-58. Carlin AF, Aristizabal P, Song Q, Wang H, Paulson MS, Stamm LM, Schooley RT, Wyles DL. PMID: 26147061; PMCID: PMC4589477.
      View in: PubMed   Mentions: 30     Fields:    Translation:HumansCells
    36. Improving Pediatric Cancer Care Disparities Across the United States-Mexico Border: Lessons Learned from a Transcultural Partnership between San Diego and Tijuana. Front Public Health. 2015; 3:159. Aristizabal P, Fuller S, Rivera R, Beyda D, Ribeiro RC, Roberts W. PMID: 26157788; PMCID: PMC4476311.
      View in: PubMed   Mentions: 10     Fields:    
    37. Preoperative Presentation of a Variant of Cerebellar Mutism Syndrome in a Young Boy With Juvenile Pilocytic Astrocytoma. Pediatr Neurol. 2015 Sep; 53(3):266-7. Chen DY, Aristizabal P, Crawford JR. PMID: 26145481.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    38. Participation in pediatric oncology research protocols: Racial/ethnic, language and age-based disparities. Pediatr Blood Cancer. 2015 Aug; 62(8):1337-44. Aristizabal P, Singer J, Cooper R, Wells KJ, Nodora J, Milburn M, Gahagan S, Schiff DE, Martinez ME. PMID: 25755225; PMCID: PMC4482802.
      View in: PubMed   Mentions: 41     Fields:    Translation:Humans
    39. Descriptive epidemiology of childhood cancer in Cali: Colombia 1977-2011. Colomb Med (Cali). 2013 Jul; 44(3):155-64. Bravo LE, García LS, Collazos P, Aristizabal P, Ramirez O. PMID: 24892613; PMCID: PMC4002030.
      View in: PubMed   Mentions: 11     Fields:    
    Maria's Networks
    Concepts (138)
    Derived automatically from this person's publications.
    Explore
    _
    Co-Authors (38)
    People in Profiles who have published with this person.
    Explore
    _
    Similar People (60)
    People who share similar concepts with this person.
    Explore
    _
    Same Department
    Search Department
    _

    UCSD Profiles is managed by the UC San Diego Altman Clinical and Translational Research Institute (ACTRI).
    This site is running Profiles RNS version UCSF-v3.1.0-15-g9ae42700 on PROFILES-PWEB04. We use cookies to operate our website. We also use cookies to analyze our site’s performance and improve your experience on our site. For more information about how we use cookies, please see our Website Terms of Use.

    Copyright © The Regents of the University of California