CARDIOVASCULAR MEDICINE: Edited by Daniel Bernstein
aThe Children's Hospital of Philadelphia
bThe Perelman School of Medicine at University of Pennsylvania, Philadelphia, Pennsylvania, USA
Correspondence to Julie A. Brothers, MD, The Children's Hospital of Philadelphia, 34th Street and Civic Center Blvd, Philadelphia, PA 19104, USA. Tel: +1 215 590 1804; fax: +1 215 590 4978; e-mail: [email protected]