1. Department of Hematology, The Mount Sinai Hospital and Medical School, New York, N. Y.
2. The Mount Sinai Hospital; permanent address: Senior Technologist, Department of Haeniatology, Royal Perth Hospital, Perth, Western Australia.
3. The Mount Sinai School of Medicine; Associate Director of Hematology, The Mount Sinai Hospital; Career Scientist (Award 1-435) of the Health Research Council of the City of New York.