Urban Hägg is an Associate Professor at the Department of Orthodontics, Faculty of Odontology, University of Lund, Malmö, Sweden. He is a Dental graduate (D.D.S.) of the University of Lund, and holds a Certificate in Orthodontics and Odont. Dr. from the same institution

John Taranger is Associate Professor at the Department of Pediatrics, University of Göteborg, Sweden, and Pediatrician at the Pediatric Outpatient Clinic, Västra Frölunda Hospital, Västra Frölunda, Sweden. He holds an M.D. degree from the University of Göteborg, Sweden