1. Endocrine fellow, Departments of Medicine and Clinical Sciences of the Albert Einstein College of Medicine at Montefiore Hospital and Medical Center, Bronx, New York 10467, US.
2. Chairman, Department of Clinical Sciences of the Albert Einstein College of Medicine at Montefiore Hospital and Medical Center, and director, Solomon A. Berson Research Laboratory at the Veterans Administration Medical Center, Bronx, New York 10468, US.