Warren Michael D, Arbogast Patrick G, Dudley Judy A, Kaltenbach Lisa, Ray Wayne A, Wang Winfred C, Cooper William O
Department of Pediatrics, Child and Adolescent Health Research Unit, Vanderbilt University, Nashville, TN 37232-4313, USA.
Arch Pediatr Adolesc Med. 2010 Mar;164(3):298-9. doi: 10.1001/archpediatrics.2009.286.