Elizabeth K. Rasch, PT, PhD
Dr. Rasch is a Staff Scientist and Chief of the Epidemiology and Biostatistics and a Staff Scientist at the NIH Clinical Center. She received her BS in Physical Therapy (PT) from the University of Delaware, her MS in PT from the University of Southern California, and her PhD in Rehabilitation Science with a concentration in Epidemiology from the University of Maryland, Baltimore. She was one of the first clinical specialists in neurology to be board certified by the American Board of Physical Therapy Specialties. Her research is directed toward promoting the health, participation, and full inclusion of people with disabilities in family and community life by informing and impacting health services, programs, and policies. More specifically, she studies the development and consequences of secondary conditions among adults with disabilities, health care delivery related to these conditions, and the effects of these conditions on function over time. Dr. Rasch has co-authored nearly 30 articles. She is a member of the Editorial Board for the Disability and Health Journal and serves the American Public Health Association in a national capacity.

Diane Brandt, PT, MS, PhD
Diane Brandt is a protocol manager in Epidemiology and Biostatistics at the NIH Clinical Center. She holds a Bachelor of Science in Physical Therapy from the University of Missouri-Columbia, a Master of Science from Washington University in St. Louis, Missouri and a PhD from the University of Missouri-St. Louis in political science, specializing in health policy. Her research interests include social welfare/health policy and implications for vulnerable populations; and, the geospatial implications of policy outcomes. She served as the designee liaison to the American Physical Therapy Association for the Mobility Chapter of the World Health Organization's International Classification of Functioning, Disability and Health (ICF) clinical manual. As a member of the Epidemiology and Biostatistics team, she assists with administrative and research activities.

Alexandra Constantin, PhD
Dr. Constantin is a statistician and computer scientist in Epidemiology and Biostatistics at the NIH Clinical Center. Her research focuses on applying and developing multivariate pattern recognition methods for the analysis of complex biomedical data. She received a PhD in Computer Science with a major in statistical learning and a designated emphasis in communication, computation, and statistics from UC Berkeley. Her dissertation work was performed in the Surbeck Laboratory for Advanced Imaging at UCSF, where she developed statistical models to assist in the clinical management and understanding of brain tumors. She also holds a Masters degree in computer science from UC Berkeley and a Bachelors degree in computer science and mathematics/statistics from Williams College.

Stephen P. Gulley, PhD, MSW
Dr. Gulley conducts research on disability and health policy for the Epidemiology and Biostatistics Section. He also teaches in the Health, Science, Society and Policy Program at Brandeis University. He received his BA in sociology from Oberlin College in 1991, his masters in social work from Boston University in 1996 and his Ph.D. in health policy from the Heller School at Brandeis in 2006. Dr. Gulley’s research focuses on access to, coordination of and financing for health care for adults with chronic conditions and disabilities. His recent projects examine the overlap between these two groups, racial and ethnic disparities in their care, gaps in their insurance coverage, as well as coordination of care through the medical home for individuals with chronic health care needs. His publications appear in such journals as Medical Care, Social Science and Medicine, the American Journal of Public Health, Public Health Reports, and the Disability and Health Journal.

Aaron Heuser, PhD
Dr. Heuser is a probabilist and research associate in the Epidemiology and Biostatistics Section at the NIH Clinical Center. A pure mathematician, with a focus in branching particle systems and superprocesses, Dr. Heuser received his doctoral degree from the University of Oregon in 2010. His research interests include superprocesses with dependent spatial motion, stochastic partial differential equations, survival analysis, interacting queueing networks, Le’vy processes, and their inherent applications toward world health and well-being. A recipient of the 2011 Clinical Center Director's Award in Science, his role in the Epidemiology and Biostatistics Section is working on the RMD inter-agency agreement with SSA to examine SSA's disability determination process, and providing statistical support for various RMD projects.

Pei-Shu Ho, PhD
Dr. Ho is a Health Services Researcher in Epidemiology and Biostatistics at the NIH Clinical Center. Her research interests include access to care, quality of care, and treatment outcomes among vulnerable populations. She has conducted health- and disability-related studies that examined health care experiences of low-income working age adults with physical disabilities, the impact of physical activity on health and secondary conditions among people with spinal cord injury, and the effect of support services on employment outcomes among people with disabilities. Her work has been published in peer-reviewed journals and presented at national scientific meetings. She is currently under contract with Epidemiology and Biostatistics to contribute to the RMD inter-agency agreement with SSA and to provide analytic and scientific research support services to Rehabilitation Medicine Department staff and trainees. Dr. Ho holds a Master’s degree in Health Services Administration from the University of Arkansas at Little Rock and a Ph.D. in Health Services Organization and Research from the Virginia Commonwealth University.

Minh Huynh, PhD
Dr. Huynh is statistician and research associate in Epidemiology and Biostatistics at the NIH Clinical Center. A labor economist by training, Dr. Huynh also has experience working in the federal government in the areas of policy evaluation, program development and research, and research on employment of people with disabilities. He has extensive experience working with large survey and administrative datasets and building micro-simulation models of the SSI and OASDI federal programs using those data. He has published in the areas of SSI, SSDI, earnings inequality and earnings mobility, employment of older and disabled workers, and long-run earnings and retirement distributions among older workers. Prior to joining NIH, Dr. Huynh worked as a private research contractor for a number of federal agencies in the area of employment of people with disabilities. From 2001 to 2004, Dr. Huynh served as Economic Editor for the Social Security Bulletin, the publication arm of the Office of Policy at the US Social Security Administration. He is currently working on the RMD inter-agency agreement with SSA to examine SSA's disability determination process, and periodically provides statistical support to various RMD projects. Dr. Huynh holds a Ph.D. in Economics from Boston College, with specializations in labor economics, micro-econometrics and applied time-series econometrics.

Chunxiao Zhou, PhD
Dr. Zhou is a statistician in the Epidemiology and Biostatistics Section of the Rehabilitation Medicine Department at the NIH Clinical Center. He holds a Masters degree in Statistics (2008) and a Ph.D. in Electrical and Computer Engineering from the University of Illinois at Urbana Champaign (2009). From 2009 to 2011, he was a visiting fellow in the Functional & Applied Biomechanics Section, Rehabilitation Medicine Department, Clinical Center, National Institutes of Health. Dr. Zhou's research has focused on statistical computing, structural and functional brain image analysis, and computer vision. His work has been published in peer-reviewed journals and presented at national scientific meetings in Statistics, Engineering, and Computer Science. He is currently working on the RMD inter-agency agreement with SSA to examine SSA's disability determination process, and will be providing statistical support to various RMD projects.

John Collins, PhD
Dr. Collins is a mathematician and postdoctoral fellow in Epidemiology and Biostatistics in the Rehabilitation Medicine Department of the NIH Clinical Center. He received his BA from Reed College, and his PhD from the University of Oregon with a specialization in algebraic geometry. Research from his dissertation has appeared in Advances in Theoretical and Mathematical Physics. His research interests include the development and application of methods to assess the validity and accuracy of diagnostic criteria and statistical measurements in medicine. He is currently working on the RMD inter-agency agreement with SSA in the development of new and innovative measures of performance of the SSA disability determination process.

Jae Chul Lee, PhD
Dr. Jae Chul Lee is a post-doctoral fellow in Epidemiology and Biostatistics in the Rehabilitation Medicine Department of the NIH Clinical Center who completed his PhD in Rehabilitation Counseling from Michigan State University with cognates in family and child ecology as well as survey research and program evaluation. He completed a 2-year Advanced Rehabilitation Research Training fellowship, which was funded by the National Institutes on Disability and Rehabilitation Research, at the Institute for Healthcare Studies in the Feinberg School of Medicine at Northwestern University. After the post-doctoral fellowship, he served as lead data analyst in two federally-funded projects focusing on disparities in health and health care among working-age adults with disabilities at Oregon Health and Science University. His research interests include disparities in health and health care and employment outcomes for adults with disabilities. His work has been presented at national scientific meetings and published in peer-reviewed journals including Health Services Research and Archives of Physical Medicine and Rehabilitation. He has been primarily working on the Adults With Chronic Health Care Needs (ACHCN) project.

Daniel Smith, PhD
Dr. Smith is a mathematician and postdoctoral fellow in Epidemiology and Biostatistics at the NIH Clinical Center. He received his doctoral degree in mathematics from the University of Pittsburgh in 2012 specializing in functional analysis and dynamical systems applied to biophysics. His role in the Epidemiology and Biostatistics Section of the Rehabilitation Medicine Department is to develop novel statistical methods to facilitate analysis inter-agency agreement with SSA.

Rajneesh Mahil
Rajneesh Mahil is a Management Analyst from Kelly Government solutions. She is nearing completion of her Bachelor’s Degree in Public Health and Psychology. Her role in Epidemiology and Biostatics section is to provide administrative support for all the Section’s research projects, with special emphasis on the SSA projects as well as the Adults with Chronic Health Care Needs (ACHCN) project. She also provides general administrative support such as budget management, scheduling, travel procedures, editing, meeting planning, procurement activities and other general administrative tasks.