Indiana University

About Us: Our Staff

Aaron E. Carroll, MD, MS

Dr. Carroll is an Associate Professor of Pediatrics at the IUSM and is the Associate Director for Research of the Children’s Health Services Research Program.  He is also an Affiliated Scientist at the Regenstrief Institute for Health Care.  Dr. Carroll received his MD from the University of Pennsylvania School of Medicine in 1998.  He completed an internship and residency in Pediatrics at the University of Washington in Seattle.  He stayed at the University of Washington to complete a health services research fellowship in the Robert Wood Johnson Clinical Scholars Program.  During that time he received his masters degree in Health Services and a certificate in Public Health Informatics.

Dr. Carroll joined IUSM in July 2003.  His initial research focused on the study of information technology to improve pediatric care.  He has however also developed a solid foundation and track record in policy research with recent publications relating to physician malpractice, pharmaceutical industry influence in medical education, and physician support of health care financing reform.  He has published almost 40 peer-reviewed manuscripts and has been awarded more than $2.1 million in direct support through both extramural and intramural funding sources. 


Ronald T. Ackermann, MD, MPH
Associate Director

Dr. Ackermann is Assistant Professor of Medicine at the Indiana University School of Medicine and is Associate Director of the IU Diabetes Translational Research Center. He is a general internist who received advanced training in epidemiology, public health, and health services research as a fellow of the Robert Wood Johnson Clinical Scholars Program and student of the University Of Washington School Of Public Health in Seattle. He is also a recipient of the Robert Wood Johnson Physician Faculty Scholars Award. Dr. Ackermann conducts research that focuses on the development and evaluation of “partnered” approaches for preventing and managing diabetes and other chronic health conditions. Since 2004, he has assisted the U.S. Agency for Healthcare Research and Quality to develop an evidence-based, web-accessible “toolkit” to guide partnerships between community groups and healthcare practices to design and implement local interventions for improving chronic disease prevention and management.  Dr. Ackermann is also a member of expert advisory panels for AHRQ, CDC, ADA, the U.S. Partnership for Prevention, and the Center for Health Care Strategies.


Jennifer Buddenbaum, MHA, MS(c)
Center Coordinator

Jennifer received her Masters Degree in Health Administration from the University of Missouri-Columbia in 1998.  After completing an Administrative Fellowship at Barnes-Jewish Hospital in St. Louis, Missouri she returned to the University of Missouri where she acted as a Quality Improvement Specialist and Grant Coordinator.  After moving to Indianapolis in 2003, Jennifer began work on her Masters Degree in Industrial/Organizational Psychology at IUPUI.  Currently Jennifer serves as a Research Specialist and Project Coordinator at Children's Health Services Research at the Indiana University School of Medicine.  For CHPPR, Jennifer acts as the Center Coordinator where her responsibilities include center administration, grant writing, manuscript development, and research project coordination.


Stephen M. Downs, MD, MS
Faculty Investigator

Dr. Downs is the Jean and Jerry Bepko Pediatric Scholar at Indiana University School of Medicine where he is Director of General Pediatrics and Children’s Health Services Research.  He also directs the Regenstrief Institute Biomedical Informatics Research Training Program.

Dr. Downs received his MD and masters degree in Medical Informatics from Stanford University.  He completed his residency in Pediatrics and a Robert Wood Johnson Clinical Scholars fellowship at the University of North Carolina at Chapel Hill.  He served for 10 more years at UNC on the faculties of the Departments of Pediatrics and Biomedical Engineering as well as the UNC School of Public Health.

Dr. Downs came to Indian University and the Regenstrief Institute in 2001 when he founded the Children’s Health Services Research section which now has 10 faculty and a research budget of nearly $6 million.  He is the co-founder of the CHICA (Child Health Improvement through Computer Automation) system.  He serves as a co-chair of the newborn screening subcommittee of the AHIC Personalized Health Care Workgroup.  He also served on the HSR Secretary’s ad hoc expert panel on newborn screening and on the Public Health Informatics Institute’s committee to develop an HL7 implementation guide for public health newborn screening programs.

His research interests include computer-based decision support systems for primary care, expected utility theory, decision analysis and cost-effectiveness analysis and their application to guideline development and computer based decision support.


Eric M. Meslin, Ph.D
Faculty Investigator

Dr. Meslin is Director of the Indiana University Center for Bioethics, Associate Dean for Bioethics and Professor of Medicine, and of Medical and Molecular Genetics in the Indiana University School of Medicine. He is also Professor of Philosophy in the School of Liberal Arts, and Co-Director of the IUPUI Signature Center Consortium on Health Policy, Law, and Bioethics. He came to Indiana University in July 2001 from the National Bioethics Advisory Commission (NBAC), where he had been Executive Director since 1998. NBAC was appointed by President Bill Clinton to advise the White House and the federal government on a range of bioethics issues including cloning, stem cell research, international clinical trials, and genetics studies. A Canadian by birth, Dr. Meslin received his B.A. in Philosophy from York University, and both his M.A. and Ph.D. from the Bioethics Program in Philosophy at the Kennedy Institute of Ethics at Georgetown University. He has held academic positions at the University of Toronto and at the University of Oxford and is currently Visiting Professor-at-Large at the University of Western Australia.  He has more than 120 publications on topics ranging from international health research to science policy, including Belmont Revisited: Ethical Principles for Research with Human Subjects (2005) co-edited with James F. Childress and Harold T. Shapiro. He has been a consultant to the World Health Organization, the US Observer Mission to UNESCO, the Canadian Institutes of Health Research and sits on several boards and committees including the Stem Cell Oversight Committee of the Juvenile Diabetes Research Foundation, the Indiana Organ Procurement Organization, and the Board of Directors of Genome Canada. In 2008 he was appointed a Chevalier de L’Order Nationale du Mérite (Knight of the National Order of Merit) by the President of France.


Rachel C. Vreeman, MD, MS
Faculty Investigator

Dr. Vreeman is an Assistant Professor of Pediatrics at the Indiana University School of Medicine and a member of the Riley Children’s Health Services Research Program.  In addition, she is Co-Director of Pediatric Research for the Academic Model for the Prevention and Treatment of HIV/AIDS (AMPATH), an academic collaboration that  provides comprehensive HIV treatment for over 70,000 patients in Kenya.  Dr. Vreeman is also an Affiliated Scientist at the Regenstrief Institute for Health Care. Dr. Vreeman is a pediatrician who received her MD from Michigan State University College of Human Medicine, and completed her internship, residency, and a chief residency in Pediatrics at the Indiana University School of Medicine.  She also completed a fellowship in Children’s Health Services Research and a masters degree in Clinical Research from the Indiana University School of Medicine.

Dr. Vreeman’s  research work focuses on the development of instruments to improve health care within resource-limited settings.  In particular, she studies how best to measure health behaviors, such as adherence to medicine for HIV. She coordinates an international research collaboration aimed to improve children’s health outcomes in Kenya. With Dr. Carroll, Dr. Vreeman also investigates how common medical beliefs become accepted by the public and by health care systems, even in the face of evidence to disprove them.  Dr. Vreeman is a member of an expert advisory panel for the U.S. Department of Health and Human Services Substance Abuse and Mental Health Services Administration.