Effectiveness of cognitive-behavioral therapy and amitriptyline in patients with chronic temporomandibular disorders: a pilot study - Calderon, Patrícia dos Santos; Tabaquim, Maria de Lourdes Merighi; Oliveira, Luiz Carlos de; Camargo, Ana Paula Afonso; Ramos Netto, Tatiana de Cássia; Conti, Paulo César Rodrigues (Brazilian Dental Journal, 2011)