Research methodology in oral diseases.
D000818:Animals; D003299:Cooperative Behavior; D004311:Double-Blind Method; D004864:Equipment and Supplies; D006801:Humans; D007400:Interprofessional Relations; D009059:Mouth Diseases; D010919:Placebos; D011643:Publishing; D012106:Research; D012107:Research Design
D010919:Placebos