title: Explaining variability.
authors.affiliation: Adjunct professor, Universidade Federal do Pará (UFPA), School of Dentistry, Belém, Pará, Brazil. Coordinator, Universidade Federal do Pará (UFPA), Graduate program in Dentistry, and ABO-Pará, Specialization course in Orthodontics, Belém, Pará, Brazil.
authors.forename: David
authors.initials: D
authors.lastname: Normando
mesh_terms: D006801:Humans; D008310:Malocclusion / Q000473:pathology / Q000628:therapy; D009971:Orthodontics, Corrective / Q000706:statistics & numerical data*; D013223:Statistics as Topic; D013997:Time Factors