Urinary incontinence between 12 and 24 months postpartum: a cross-sectional study nested in a Brazilian cohort from two cities with different socioeconomic characteristics - Magnani, Pedro Sergio; Bettiol, Heloisa; Silva, Antonio Augusto Moura da; Barbieri, Marco Antonio; Cavalli, Ricardo de Carvalho; Brito, Luiz Gustavo Oliveira (International Urogynecology Journal, 2019)