1. Department of Hematology, The Mount Sinai Hospital, New York, N. Y.
2. aided by grant CPD-14, 431 (Cl) from The National Cancer Institute, U. S. Public Health Service. At present: Assistant Physician (Medicine) and Research Associate (Hematology), Maimonides Hospital, Brooklyn, N. Y.
3. The Mount Sinai Hospital, New York, N. Y.