title: Fourth and forty?
authors.affiliation: Department of Orthodontics, University of Washington, Seattle, WA 98195, USA. ghuang@u.washington.edu
authors.forename: Greg
authors.initials: G
authors.lastname: Huang
mesh_terms: D015982:Bias; D019317:Evidence-Based Medicine / Q000706:statistics & numerical data*; D006801:Humans; D015588:Observer Variation; D009971:Orthodontics, Corrective / Q000009:adverse effects / Q000706:statistics & numerical data*; D010510:Periodontal Diseases / Q000453:epidemiology*; D015203:Reproducibility of Results; D012196:Review Literature as Topic; D016896:Treatment Outcome