1. Dialysis Facilities and Associate in Medicine, Peter Bent Brigham Hospital; Instructor in Medicine, Harvard Medical School.
2. Harvard Medical School and Peter Bent Brigham Hospital; Research Associate, Elliott P. Joslin Research laboratories.
3. Mathematical Biology and the Elliott P. Joslin Research Laboratory in the Department of Medicine, Harvard Medical School; Associate-Staff-Medicine. Peter Bent Brigham Hospital. Work performed during postdoctoral fellowship from the National Institute of Arthritis and Metabolic Diseases. Bethesda, Maryland (Grant 1-F2-AM 29, 37402).
4. Harvard Medical School; Assistant in Medicine, Peter Bent Brigham Hospital.
5. Elliott P. Joslin Research laboratory in the Department of Medicine, Harvard Medical School.
6. Cardiorenal laboratories and Senior Associate in Medicine, Peter Bent Brigham Hospital; Associate Professor of Medicine, Harvard Medical School. Investigator, Howard Hughes Medical Institute.