Does pelvic floor muscle maximum voluntary contraction improve after vaginal pelvic organ prolapse surgery?: a prospective study - Duarte, Thaiana Bezerra; Bonacin, Marília Almeida Prado; Brito, Luiz Gustavo Oliveira; Frawley, Helena C.; Dwyer, Peter L.; Thomas, Elizabeth; Ferreira, Cristine Homsi Jorge (Neurourology and Urodynamics, 2018)