1. Departments of Hematology and Experimental Surgery, Walter Reed Army Institute of Research, Washington, D. C.
2. Department of Hematology, Walter Reed Army Institute of Research, Washington, D.C.
3. Department of Hematology, Walter Reed Army Institute of Research, Washington, D. C. Present address: Ospedale Cioile, Tortona, Italy.
4. Department of Hematology and Director, Division of Medicine, Waiter Reed Army institute of Research, Washington, D. C.
5. Department of Experimental Surgery, Walter Reed Army Institute of Research, Washington, D. C.