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Michael Weiner, M.D., M.P.H. is Principal Investigator and Director of the Department of Veterans Affairs Health Services Research & Development Center for Health Information and Communication, Professor of Medicine at the Indiana University School of Medicine, and a Scientist of Regenstrief Institute's William M. Tierney Center for Health Services Research, in Indianapolis, Indiana, U.S.A. His clinical and health-services research focuses on measuring and improving the quality, coordination, and delivery of health services, especially for older adults. He studies the effects of health information and information technology on behaviors, clinicians' practices, and patients' outcomes. He has conducted studies of specialty referral, patient-physician videoconferencing, and other forms of telecommunication to improve health care. Study methods have included cohort studies, clinical trials, surveys, and focus groups. Current research includes the development, implementation, and study of information systems to promote clinical handoffs, management of medications, patient-centered care, health information exchange, and clinical decision support.