2014-Present Professor of Medicine Tsinghua University 2008-2014 Professor Cellular and Molecular Physiology and Internal Medicine, Yale University 2000-2007 Associate Professor Cellular and Molecular Physiology and Internal Medicine, Yale University 1994-2000 Assistant Professor Cellular and Molecular Physiology and Internal Medicine, Yale University 1993-1994 Lecturer Physiology & Pharmacology, University of Lausanne, Switzerland. 1991-1993 Postdoctoral Fellow Physiology & Pharmacology, University of Lausanne, Switzerland. 1988-1990 Postdoctoral Fellow Nephrology Department, University of Alabama, USA 1983-1988 Medicine, University of Minnesota, USA