title: More questions.
authors.forename: John L
authors.initials: JL
authors.lastname: Hayes
mesh_terms: D015982:Bias; D006801:Humans; D009971:Orthodontics, Corrective; D010510:Periodontal Diseases / Q000145:classification*; D012107:Research Design / Q000706:statistics & numerical data; D012196:Review Literature as Topic