1. The University of Rochester School of Medicine & Dentistry, Rochester, New York
2. The VA Medical Center, St. Louis, Missouri, Stony Brook, New York
3. The State University of New York College of Medicine, Stony Brook, New York
4. The Frauenklinik Rechts der Isar, Technische Universität, München, West Germany
5. The Columbia University College of Physicians & Surgeons, New York, New York
6. The National Institute for Biological Standards and Control, London, England