From the Divisions of Emergency Medicine (J.C. Posner, K.C. Osterhoudt, C.J. Mollen, C.R. Jacobstein), Anesthesiology (S.C. Nicolson) and Cardiothoracic Surgery (J.W. Gaynor), The Children’s Hospital of Philadelphia, The University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania.
Address for reprints: Jill C. Posner, MD, Division of Emergency Medicine, The Children’s Hospital of Philadelphia, 34th Street and Civic Center Boulevard, Philadelphia, PA 19104; e-mail: email@example.com