CGHE members span the University of Michigan and the globe, including faculty experts, research collaborators, scholars, and community partners. Search for Members with Keywords, Sponsors, Locations, or Categories + John Ayanian, MD, MPP Access to care, quality of care, and health outcomes Mohammad Ghaziuddin, MD Diagnosis and treatment of child and adolescent psychiatric disorders Timothy (Tim) Hofer, MD, MS Quality improvement and healthcare delivery Kelley Kidwell, PhD Clinical trial designs & analysis Kenneth (Ken) Langa, MD, PhD Cognitive decline and dementia among older adults Paul Lee, MD, JD Quality of care, health care utilization and policy Sheryl (Sherri) Olson, PhD Developmental and social processes related to child and adolescent adjustment, development of emotion regulation and social cognition Rob Stephenson, PhD Sexual and reproductive health, HIV prevention, sexual and gender minority health, and intervention development testing