Johns Hopkins Hospital

By John L. Cameron, MD, FACS, FRCS(Eng) (hon), FRCS(Ed) (hon), FRCSI(hon), The Alfred Blalock Distinguished Service Professor, Department of Surgery, The Johns Hopkins Medical Institutions, Baltimore, MD, USA; Lauren Kahl, MD, Harriet Lane Pediatric Residency Program, Johns Hopkins Children?s Center, Baltimore, Maryland and Helen K Hughes, MD, MPH, Harriet Lane Pediatric Residency Program, Johns Hopkins Children's Center, Baltimore, Maryland.