1. National Cancer Institute, National Institutes of Health, Bethesda, Md. 20014.
2. Medical Oncology. National Cancer Institute, Bethesda. Md.
3. Duke University, Durham. N.C.
4. Mayo Clinic, Rochester, Minn.
5. Medicine A, Roswell Park Memorial Institute, Buffalo, N. Y.
6. National Cancer Institute, Bethesda. Md.