BAKKEN, PAUL C.; EVANS, VIRGINIA J.; EARLE, WILTON R.; STEVENSON, ROBERT E.; BAKKEN PAUL C.; Tissue Bank, Naval Medical School, National Naval Medical Center, Bureau of Medicine and Surgery, Department of the Navy, U.S.Department of Defense, Washington, D.C.; EVANS VIRGINIA J.; Tissue Culture Section, Laboratory of Biology, National Cancer Institute, National Institutes of Health, Public Health Service, U. S.Department of Health, Education and Welfare, Bethesda, Md.; EARLE WILTON R.; Tissue Culture Section, Laboratory of Biology, National Cancer Institute, National Institutes of Health, Public Health Service, U. S.Department of Health, Education and Welfare, Bethesda, Md.; STEVENSON ROBERT E.; Tissue Bank, Naval Medical School, National Naval Medical Center, Bureau of Medicine and Surgery, Department of the Navy, U.S.Department of Defense, Washington, D.C.