1. From the Clinical and Anatomic Pathology Residency Program, Walter Reed National Military Medical Center, Bethesda, Maryland (Davis).
2. From the Joint Pathology Center, Silver Spring, Maryland (Auerbach, Crothers, Schmieg III).
3. From the Department of Pathology, Women & Infants Hospital, Providence, Rhode Island (Lewin).
4. From the Department of Pathology, Brooke Army Medical Center, Fort Sam Houston, Texas (Lynch, Teschan).