Can anxiety increase tremors in patients with Parkinson’s disease?: an experimental model - Chagas, Marcos Hortes Nisihara; Oliveira, Taís Helena Garcia Fernandes de; Linares, Ila Marques Porto; Balarini, Fernanda Belinassi; Chagas, Natália Mota de Souza; Tumas, Vitor; Crippa, José Alexandre de Souza (Archives of Clinical Psychiatry (São Paulo), 2017)