1. Department of Orthodontics and Oral Biology and Head of the Cleft Palate Craniofacial Unit of the University Hospital Sint Radboud, University of Nijmegen, The Netherlands.
2. Lancaster Cleft Palate Clinic and Orthodontics and Research of the Lancaster Cleft/Craniofacial Program, Lancaster, Pennsylvania; Orthodontics, Albert Einstein Medical Center, Department of Orthodontics, Philadelphia, Pennsylvania; and Orthodontics, Department of Orthodontics, University of Maryland Dental School, Baltimore, Maryland.