1. From the Genetics Branch, Center for Cancer Research; Orkand Corporation, Contractor; Center for Cancer Research, Biostatistics and Data Management Section; Center for Cancer Research, Laboratory of Cellular and Molecular Biology; National Cancer Institute, National Institutes of Health; National Center for Complementary and Alternative Medicine, National Institutes of Health; Uniformed Services University, Bethesda, MD; and Genentech, Inc, San Francisco, CA