The American Academy of Pediatrics (AAP) is an organization of 67,000 pediatricians dedicated to the health, safety, and well-being of infants, children, adolescents, and young adults. Mark L. Wolraich, MD, FAAP, is the Shaun Walters Professor of Pediatrics, Edith Kinney Gaylord Presidential Professor, and chief of developmental and behavioral pediatrics at the University of Oklahoma Health Sciences Center. He is the editor in chief of Guide to Toilet Training. Dr. Wolraich lives in Oklahoma City, OK. Joseph F. Hagan Jr, MD, FAAP, is a clinical professor of pediatrics at The Robert Larner, MD College of Medicine at the University of Vermont and UVM Children's Hospital.

He is the coeditor of Bright Futures: Guidelines for Health Supervision of Infants, Children, and Adolescents. Dr. Hagan practices primary care pediatrics and lives in Burlington, VT.