1. Colonel, USMC (Retired), Administrator, Dept. of Orthopaedic Surgery, Johns Hopkins Bayview Medical Center, 4940 Eastern Ave., Baltimore, MD 21224. E-mail: c/o Elaine P. Henze, Medical Editor;
2. S. E. Liles Distinguished Professor, Dept. of Civil Engineering, Clemson Univ., Clemson, SC 29634.