1. Diabetes Research Laboratory, VA Hospital, and Instructor in Medicine, Georgetown University School of Medicine.
2. Renal Section, VA Hospital.
3. Renal Section, VA Hospital, and Associate Professor of Medicine, Georgetown University School of Medicine.
4. Diabetes Research Laboratory, VA Hospital.
5. Assistant Chief,Renal Section, VA Hospital, and Associate Professor of Medicine, George Washington University School of Medicine, Washington, D.C.
6. Diabetes Research Laboratory, VA Hospital, and Professor of Medicine, Georgetown University School of Medicine.