Birmingham, Patrick K. M.D., F.A.A.P.; Dsida, Richard M. M.D., F.A.A.P.; Grayhack, John J. M.D.*; Han, Jianping M.D.*; Wheeler, Melissa M.D., F.A.A.P.; Pongracic, Jacqueline A. M.D.†; Coté, Charles J. M.D., F.A.A.P.; Hall, Steven C. M.D., F.A.A.P.
Study conducted at Children's Memorial Hospital, Chicago, Illinois, U.S.A.
From the Department of Anesthesia and Divisions of *Orthopedic Surgery and †Allergy & Immunology, Children's Memorial Hospital, Northwestern University, Chicago, Illinois, U.S.A.
Address correspondence and reprint requests to Dr. P. Birmingham at Box 19, Children's Memorial Hospital, 2300 Children's Plaza, Chicago, IL 60614-3394. U.S.A.