Affiliation: | a St. Jude Children's Research Hospital, Memphis, TN b Clinical Trials & Surveys, Corp., Baltimore, MD c Johns Hopkins University School of Medicine, Baltimore, MD d Children's Hospital of Michigan, Detroit, MI e University of Mississippi Medical Center, Jackson, MS f University of Miami School of Medicine, Miami, FL g Radiology, Children's National Medical Center, Washington, DC h Cincinnati Children's Hospital Medical Center, Cincinnati, OH i Radiology, Harbor-UCLA Medical Center, Torrance, CA j School of Medicine, Emory University, Atlanta, GA k SUNY-Downstate Medical Center, Brooklyn, NY |