1. Blood Research Laboratory, Pratt Clinic-New England Center Hospital, and the Department of Medicine, Tufts University School of Medicine, Boston, Mass.
2. Blood Research Laboratory, Pratt Clinic-New England Center Hospital, and Assistant in Medicine, Tufts University School of Medicine, Boston, Mass.
3. Blood Research Laboratory, Pratt Clinic-New England Center Hospital, Boston, Mass.; now Assistant in Medicine, Mount Zion Hospital Medical Center, San Franciso, Calif.
4. Blood Research Laboratory, Pratt Clinic-New England Center Hospital, and Assistant Professor of Medicine, Tufts University School of Medicine, Boston, Mass.
5. Pratt Clinic-New England Center Hospital, and Professor of Medicine, Tufts University School of Medicine, Boston, Mass.