1. R. D. Gibbons is a Professor of Biostatistics, University of Illinois at Chicago, Chicago, IL 60612.
2. IOM Committee Members: D. Meltzer, N. Duan, Edward E. Penhoet (Chair), Nancy N. Dubler, Charles K. Francis, Barbara Gill, Eva Guinan, Maureen Henderson, Suzanne T. Ildstad, Patricia A. King, Manuel Martinez-Maldonado, George E. McLain, Joseph E. Murray, Dorothy Nelkin, Mitchell W. Spellman. Project Staff: Andrew Pope, Sarah Pitluck.