*Department of Pediatrics, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania;
†Department of Surgery, Emory Transplant Center, Emory University, Atlanta, Georgia;
‡Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia;
§Department of Rehabilitation Medicine, Emory University, Atlanta, Georgia; and
‖Department of Medicine, Emory University, Atlanta, Georgia
Correspondence: Dr. Sandra Amaral, Children’s Hospital of Philadelphia, 34th Street and Civic Center Boulevard, Philadelphia, PA 19104. Email: [email protected]
Received December 5, 2011
Accepted February 14, 2012
