Professor, University of Alberta

Georgetown University

Professor of Geriatric Medicine, University of Sydney

City University of New York at Hunter College and Harvard Medical School

Professor of Medicine, University Hospitals of Geneva

Professor, McMaster University

Professor of Medicine and Medical Humanities & Ethics, Columbia University

Research associate professor, University of Washington

Deputy Editor, NEJM; Professor of Medicine, USU

Université de Liège (ULiège) et CHU de Liège