1. Jinbo Chen is Assistant Professor, Department of Biostatistics and Epidemiology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104 . Mitchell H. Gail and Nilanjan Chatterjee are Senior Investigators, and Catherine Schairer is Staff Scientist Epidemiologist, Biostatistics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD 20852. Rajeev Ayyagari and David Y. Pee are Biostatisticians, Information Management Services, Rockville, MD 28052. Celia...