Colin Barr  (916) 703-5651
Rima Cabrera  (916) 703-5642
Colleen Cameron  (916) 734-6340
David Chin  (916) 734-4793
Camille Cipri  (916) 734-2672
Carolyn Coleman   (916) 734-4082
Ginger Cox  (916) 734-5543
Dionne Evans Dean  (916) 734-5766
Clyde Dsouza   
Gisela Escalera  (916) 734-2877
Teresa Farley  (916) 734-4665
Evani Gatbonton   (916) 734-4615
Suzy Hale  (916) 734-2818
Linda Lewis  (916) 734-2829
Helene Margolis  (916) 734-7412
Maria Marois  (916) 703-5643
Dominique Ritley  (916) 734-2681
Mauricio Rodriguez  (916) 734-3161
Meghan Soulsby  (916) 734-5316
Laura Bates Sterner   (916) 734-7918
Daniel J. Tancredi  (916) 734-3293
Benjamin Timmons   (916) 734-2463
Liz Vice   (916) 734-2399
Chloe Villarea  (916)734-8542
Guibo Xing  (916) 734-6895
Pat Zrelak  (916) 734-8931

Colin Barr  
Community Health Program Representative
(916) 703-5651

Colin joined the Center in 2013, and works on the Personalized Research for Monitoring Pain Treatment (PREEMPT) study. Colin holds a Bachelor of Science in Psychology from the University of Auckland and a Post-Graduate Diploma in Public Health from the University of Otago. Previously he worked at the University of Connecticut, on a HIV-Behavioral Intervention and as a research assistant at Victoria University of Wellington.


Rima Cabrera, M.S.W. 
Community Health Program Representative
(916) 703-5642

Rima joined the Center for Healthcare Policy and Research in April 2013. She is working with the Values and Options in Cancer Care (VOICE) Study. Rima previously worked for UC Davis with the Departments of Family Medicine and Pediatrics. She holds a Master of Social Work degree. Her previous work experience was community outreach, mental health, and medical social work.


Colleen Cameron 
Administrative Assistant III
(916) 734-6340

Image  of Colleen CameronColleen is an Administrative Assistant III, working with various Center projects.  She is a member of the award-winningGrants team and supports research projects with expertise in financial management and projectcoordination. 

In addition to her project work, she coordinates the weekly Health Services Research Seminar Series which brings interesting and informative topics to the Center membership and other interested University faculty and students. 


David Chin 
Graduate Student Researcher
(916) 734-4793

Image of  David ChinDavid, a PhD student in the Graduate Group in Epidemiology, has been at the Center since 2008. His research focuses on iatrogenic infection prevention and healthcare quality measurement. His primary emphases arethe effect of Clostridium difficile infection and treatment on patient outcomes and the development of quality indicators using administrative data. His other research interests include the impact of state policy on health outcomes. He holds an undergraduate degree in Biochemistry and Molecular Biology from the University of California Santa Cruz.


Camille Cipri 
Project Manager
(916) 734-2672

Camille has been with the UC Davis Center for Healthcare Policy and Research (CHPR) since 2005.  She has worked on various research projects related to depression, cancer, patient advocacy, and nutrition and physical activity. Her role at the Center has been to provide support for all aspects of research conduct, including: IRB protocol development; data collection, management and analysis; research subject recruitment; delivering interventions; and manuscript development and support. Currently, she is the project manager for the Values and Options in Cancer Care (VOICE) Study. This study is funded by the NCI and aims to improve communication between advanced cancer patients, their loved ones, and oncologists.  

Carolyn Coleman 
Financial Manager
(916) 734-4082

Image  of carolyn colemanCarolyn joined the Center in 2004 and has served as the Center’s Financial Manager since 2005. She is responsiblefor providing comprehensive financial oversight and support for the Center in the areas offiscal management, expenditure control, compliance, and contract and grant administration from pre-award through post-award and closeout. Carolyn has a BS in Business Administration-Finance from CSUS.


Ginger Cox, R.H.I.T., C.C.S. 
ICD-9/10 Coding and Conversion Analyst
(916) 734-5543

Image  of Ginger CoxGinger Cox serves as an ICD-9/10 Coding and Conversion Analyst at the CHPR, working on the Support for AHRQQuality Indicators contract (PI:  Patrick Romano).    Ms. Cox is a nationally respectedexpert in ICD-9-CM and ICD-10-CM/PCS coding.  Ms. Cox is a registered Health Information Technician and Certified Coding Specialist, and an AHIMA approved ICD-10/CM/PCS trainer.  She has a strong healthcare background with solid understanding of coding and usage of ICD-9-CM code set and its set of official guidelines for coding and reporting. 

Ms. Cox is assisting in the preparation for ICD-10 code sets, focusing primarily on ICD codes that define the indicator numerators and selected demominator inclusions and exclusions and support the clinical assessment of the proposed ICD-10 maps by participating in panels to review the specifications.  She serves as an in-house resource for the CHPR on ICD coding issues and will represent the Center in various coding-related venues.


Dionne Evans Dean, B.S., M.H.A. 
Project Coordinator
(916) 734-5766

Image of Dionne Evans DeanDionne joined the Center in 2006. Currently, Dionne serves as a Senior Project Coordinator, charged with administration and delivery of randomized control trials. Her experience involves recruiting and training community health educators and research assistants, screening and enrolling patients, and database management. She served as coordinator to two multisite studies: the Cancer Health Empowerment for Living without pain (Ca-HELP) study funded by the American Cancer Society and the Colorectal Cancer Interactive Multimedia Computer Program (CRC IMCP) study funded by the National Cancer Institute. Dionne holds a Bachelor of Science degree in Biological Sciences from UC Davis and a Masters in Health Administration from the University of Southern California, Sacramento campus. Prior to her work at the Center, Dionne worked as a project assistant for UCSF’s Institute for Health and Aging as a contractor with the California Department of Public Health.


Shauna Durbin
Research Assistant
(916) 734-4292

Shauna Durbin joined the Center in December 2014. She works as a research analyst on a variety of projects, including a systematic review for the National Cancer Institute evaluating long-term adverse outcomes in women with early-stage breast cancer resulting from adjuvant chemotherapy regimens. During the legislative season she participates in the California Health Benefits Review Program for which she provides public health analyses of California legislation impacting state health benefits.
Shauna holds an MPH from the University of Arizona School Of Public Health with a concentration in health policy and geographic information science.

Gisela Escalera 
Community Health Program Representative
(916) 734-2877

Gisela joined the Center in 2009. Gisela is a UC Davis alumna and holds a Master of Social Work degree. Her work at CHPR has involved patient-centered coaching, delivering interventions in English and Spanish, patient recruitment, preparation of IRB documents and development of educational curriculum and data collection tools.

Her previous work experience was in the areas of employment services, mental health, and school social work. She is bilingual.


Teresa Farley, M.S. 
Management Services Officer
(916) 734-4665

Image of Teresa FarleyTeresa joined the center in 2004 and has over 25 years of project and operations management. She currently serves as the Center Management Service Officer providing leadership for the center, managing various research projects and the center daily operations. Teresa holds a masters’ degree in counseling, with a career specialization.

Her current research interests include health care quality, healthcare and prevention in underserved populations. Teresa is especially interested in community based research, working in collaboration with a variety of providers, community partners and schools to reach underserved and marginalized populations including non-native English speakers. She is bilingual, reading, writing and speaking Spanish fluently.


Evani Gatbonton 
Community Health Program Representative
(916) 734-4615

Image of Evani GatbontonEvani joined the Center for Healthcare Policy and Research in August 2013. At the Center, she works on the SmokingCessation in Hospitalized Smokers study in conjunction with UCSD, funded by the National Cancer Institute. She is responsible for subject recruitment, conducting interviews and coordinatingdata entry. She is also working with Breathe Sacramento on the Sacramento Taking Action Against Tobacco Dependence (STAND) Project.

Evani holds a Bachelor of Arts in Psychology from UC Davis. Her current research interests include public health, tobacco cessation counseling and public policy. Her previous appointment was with the Department of Public Health at the MIND Institute coordinating the EARLI study, a prospective autism study on pregnant women and their families. She has experience in study coordination, administering psychological assessments, subject recruitment and data management.


Suzy Hale 
Financial / Admin Assistant
(916) 734-2818

Image of  Suzy HaleSuzy is a UC Davis veteran, bringing over 29 years of UC Davis and UC Davis Health System experience to her Center role as Financial and Administrative Assistant.


Helene Margolis, Ph.D. 
Principal Investigator
(916) 734-7412

Image of Helene MargolisHelene Margolis joined the Center in 2010. She is an Associate Adjunct Professor in the Department of InternalMedicine: Division of General Medicine where she has held an appointment since 2005. 

She transitioned to UCD full time in 2010 to devote her energies to her University-based research program, facilitated via the award of an ARRA Challenge Grant (‘Projected Heat Wave Magnitudes and Public Health Impacts’; NIEHS), and other collaborative research projects. Over the prior 20 years she held a series of professional positions as a State government-based scientist and policy analyst, during which time she initiated major extramural research programs and established herself as a leader in the area of vulnerable populations’ health research and policy, with an emphasis on the influence of environmental factors, especially air pollution, on the health of children and older adults. She has extensive expertise on climate change health impacts, both as a research scientist and as a public health practitioner on the front lines during climate-related emergencies, including the 2006 California heat wave. Her training in epidemiology (PhD), immunology (MA), and marine sciences (oceanography)/biology/conservation (B.A.) gives her a unique knowledge-base and perspective on issues related to climate change.

Helene Margolis’ research interests include: Public health impacts of climate change and variability, including clinical ramifications and interventions to reduce vulnerability; pathophysiology/mechanisms and influence of environmental factors on natural history of chronic diseases (respiratory, cardiovascular, metabolic, immunologic); children’s environmental health; pediatric asthma and lung function growth; gene-environment interactions; exposure assessment; and translation of research findings into integrated public health and environmental policies. A particular interest is development of multiple-determinant models of chronic disease and related health outcomes that incorporate individual- and community-level factors and assess vulnerability across the life-span. She is committed to addressing issues of ethics in environmental health research, social inequities in health and environmental policy and access to healthcare.


Maria Marois, Ph.D., M.P.H. 
Project Manager
(916) 703-5643

Image of Maria MaroisMaria Marois joined the Center in June 2013 as project manager of the Personalized Research for Monitoring PainTreatment (PREEMPT) Study. The study is assessing the effect of using a mobile phone application to assist chronic pain patients in collecting and understanding information about their pain and related symptoms. The overall goal of the study is to improve participatory decision making between clinicians and patients.Maria began her career at UC Davis in 1992 as a health educator for the Center for Aging and Health. In 1998 she joined the Western Center for Agricultural Health and Safety at UC Davis and coordinated the Study of Agricultural Lung Disease (SALUD), a study examining paraquat exposure among agricultural workers in Costa Rica. Prior to joining the research team at CHPR, she served as project manager for the MICASA study, a cohort investigation of occupational and environmental health risks in farm worker families (2005-2013). She holds a PhD in epidemiology from UC Davis and received her MPH with an emphasis in health promotion from San Diego State University.


Dominique Ritley, M.P.H. 
Research Analyst
(916) 734-2681

Image of Dominique RitleyDominique Ritley joined the Center as a research analyst in 2006. Her experience in health policy is most recentlyapplied to a project with the California Department of Managed Health Care, Office of Patient Advocate to evaluate and recommend new measures for inclusion in California'sHealthcare Quality Report Card. She also participated in the California Health Benefits Review Program providing medical effectiveness and public health analysis of California legislation impacting health benefits.

Dominique received her MPH in public health policy and administration from the University of Michigan School of Public Health.


Mauricio Rodriguez 
Community Health Program Representative
(916) 734-3161

Image of Mauricio RodriguezMauricio has been working for the Center of Healthcare Policy and Research as a Health Coach since October 2010. He’s bicultural, bilingual, and delivers telemedicine education to patients in both English and Spanish.

Mauricio is currently working on a Master of Public Health degree at Drexel University. His previous appointment with UC Davis was with the Department of Psychiatry working on the Men’s Health and Aging Project researching depression. 


Meghan Soulsby, M.P.H. 
(916) 734-5316

Image  of meghan soulsbyMeghan Soulsby joined the Center January 2011. She serves as the UC Davis project manager for the multi-center,randomized-controlled trial “BetterEffectiveness After Transition for Heart Failure” (BEAT-HF) study. Led by UCLA, this study examines the effects of enhanced inpatienteducation coupled with post-discharge telephone follow-up and remote telemonitoring on readmission rates for elderly patients with heart failure.

Meghan also works as a research analyst on a variety of projects, including a recent CDC-funded project examining the scope and burden of prescription opioid misuse and overdose, and the effectiveness of state-run programs and policies to reduce the rate of misuse and overdose. During the legislative season, Meghan works on the California Health Benefits Review Program, providing public health analyses of California legislation impacting health benefits. Meghan received an MPH from the Boston University School of Public Health with a focus on community health sciences.


Laura Bates Sterner 
CHPR Analyst
Associate Managing Editor
Journal of General Internal Medicine
(916) 734-7918

Image of Laura Bates SternerLaura Bates Sterner came to the Center in late January of 2007 and assumed her current role in July 2007. She bringsa variety of relevant experience to the Center.

Laura is responsible for the Center's communications, including print and internet. She is a member of the CHPR's Grants Development team. Laura also provides assistance as needed to the Director and Management Services Officer, and handles a variety of special projects including events planning and management.

Currently, she also functions as an Associate Managing Editor of the Journal for General Internal Medicine.


Daniel J. Tancredi, Ph. D.  
Assistant Professor (In Residence) of Pediatrics
(916) 734-3293

Image of Dan Tancredi, Ph. D.Daniel Tancredi joined the Center in 2002, after gaining extensive experience in the design, implementation andanalysis of health services and epidemiological research at Rush University Medical Center. Formally trained as a mathematical statistician at the University of Illinois at Chicago, hisresearch interests include effective study designs and analysis plans for observational and experimental studies. He has particular interest in the analysis of correlated data, as arise in clinic-randomized trials, settings with repeated measurements and surveys that use complex probability sampling techniques.

In 2007 Daniel Tancredi accepted a faculty appointment in the UC Davis School of Medicine, Department of Pediatrics. A large part of his new role continues to be collaboration with investigators at the Center, where his faculty office is located.


Benjamin Timmons 
Information Systems
(916) 734-7413

Image  of Ben TimmonsBen has worked in Academic Technology Support since 1991. Since 1998, he has focused on providing support fora number of research projects, some with national scope. Ben works with research investigators and staff to devise systems and resources to meet the qualitative and quantitative needs of each project.

Ben is increasingly focused on data, workstation and network security. Protecting data integrity, especially Patient Health Information (PHI) is of utmost importance, given both Federal mandates like HIPPA and the increase in healthcare data breaches. Techniques, such as workstation security, full-disk, file-based and email encryption increase this security

Prior to joining UC Davis in 2000, Ben worked at Boston College focusing on academic support and two national community healthcare research projects. Before that Ben worked at Simmons College, where he helped to form the Microcomputer Support Center and implement PC-based educational technology as well as the first PC-based network on campus.


Liz Vice 
Project Manager
(916) 734-2463

Image of Ruth BaronLiz Vice joined the Center of Healthcare Policy and Research in July 2012 and currently works as Project Manager on the Quality Indicator™ contract sponsored by the Agency for Healthcare Research and Quality (AHRQ).

Liz has a Bachelor's Degree in Government from California State University, Sacramento. She has 18 years of project management, contract compliance, healthcare policy and managed care operations experience to provide to the CHPR team. She spent the last 6 years as a consultant for area law firms managing and developing client databases, providing staff management guidance, policy and procedure development and paralegal services.

She has experience with the state legislative process, Department of Defense, Veteran's Adminstration, Health Affairs and Military Treatment Facility management.  She has an interest in public policy, healthcare advocacy and law.


Chloe Villareal 
Community Health Program Representative
(916) 734-2399

Chloe joined the CHPR and currently works on two projects at the Center, Provider Training to Support Patient Self-efficacy for Depression Care and Promoting Patient-centered Counseling to Reduce Inappropriate Diagnostic Tests.


Guibo Xing, Ph.D.
Senior Statistician
(916) 734-6895

Image of Guibo Xing, Ph. D.Guibo joined the Center as a statistician in March 2003. He has been providing statistical support primarily tofaculties, fellows and residents from the Department of Obstetrics and Gynecology. He has used his statistical skills of survival analysis and categorical data analysis on various research projects, including Association of Cancer Risks with Obstetrical Delivery,Trauma during Pregnancy and Neonatal Outcome, and Trends of Hysterectomy Incidence, Type, and Complications. Databases that he uses for those studies include OSHPD hospital discharge data, infant birth and death certificates, and California Cancer Registry data. He also had experience doing econometric analysis using models such as time-series models, panel data models, count data models, selection models, hurdle models and two-part models.


Pat Zrelak, Ph.D., C.N.R.N., C.N.A.A., B.C.
Administrative Nurse Researcher
(916) 734-8931

Image of Pat ZrelakPat joined the center in 2006. She currently works on the Patient Safety Indicator (PSI) Project sponsored by the Agencyfor Healthcare Research and Quality (AHRQ).

Pat holds a PhD in Epidemiology from UC Davis as well as a MS in Health Science and BS in Nursing. She is the administrative nurse for the UC Davis Stroke Program, and has over 25 years of experience in healthcare, primarily in management and education. Pat is board certified in Advanced Nursing Administration (CNNA, BC) and is a Certified Neuroscience Registered Nurse (CNRN). Research interests include stroke and dementia.

Besides working at UC Davis, Pat holds a faculty position at Samuel Merritt College where she teaches several courses including Research Methods and Biostatistics & Epidemiology.

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