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 + Andrew Chang, MD Thoracic surgery with a particular focus on thoracic oncology Kenneth (Ken) Langa, MD, PhD Cognitive decline and dementia among older adults Margaret (Maggie) Levenstein, PhD, MA Economic behavior and methodology in regards to health care supply chains