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2. Who needs surgical-orthodontic treatment?;Proffit;Int J Adult Orthod Orthognath Surg,1990
3. Who seeks surgical-orthodontic treatment? The characteristics of patients evaluated in the UNC dentofacial clinic;Proffit;Int J Adult Orthod Orthognath Surg,1990
4. Prevalence and distribution of selected occlusal characteristics in the US population, 1988-91;Brunelle;J Dent Res,1996
5. Prevalence of malocclusion and orthodontic treatment need in the United States: estimates from the NHANES III survey;Proffit;Int J Adult Orthod Orthognath Surg,1998