1. C. Wang was Ph.D. Student, Department of Statistics, University of Florida, Gainesville, FL 32611, and is Mathematical Statistician, Division of Biostatistics, Center for Devices and Radiological Health, Food and Drug Administration, Silver Spring, MD 20993. M. J. Daniels is Professor and Chair, Department of Statistics, University of Florida, Gainesville, FL 32611 . D. O. Scharfstein is Professor, Department of Biostatistics, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD...