Ludwig Björn, Alexander J Clifton, Cacciafesta Vittorio, Fillion Didier, Gilbert Alfredo, Moles Randall C, Paz Mario E, Silli Silvia M, Takemoto Kyoto
Department of Orthodontics, University of Homburg, Saar, Germany.
J Clin Orthod. 2012 May;46(5):275-92.