Proportion of cesarean deliveries according to hospital funding in São Paulo Metropolitan Area, Brazil - Raspantini, Priscila Ribeiro; Silva, Zilda Pereira da; Alencar, Gizelton Pereira; Moura, Bárbara Laisa Alves; Nascimento, Felipe Parra do; Rodrigues, Laura Cunha; Santos, Patrícia Carla dos; Almeida, Marcia Furquim de (Open Journal of Obstetrics and Gynecology, 2015)