Leon-Salazar Vladimir, Morrow Leesa, Schiffman Eric L
Division of Orthodontics, Department of Developmental and Surgical Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minn. 55455, USA.
J Am Dent Assoc. 2012 Sep;143(9):989-91. doi: 10.14219/jada.archive.2012.0325.