Steingass Katherine J, Chicoine Brian, McGuire Dennis, Roizen Nancy J
Department of Pediatrics, Division of Developmental-Behavioral Pediatrics and Psychology, Case Western Reserve University School of Medicine, Cleveland, OH, USA.
J Dev Behav Pediatr. 2011 Sep;32(7):548-58. doi: 10.1097/DBP.0b013e31822182e0.