The golden hour for postpartum hemorrhage: results from a prospective cohort study - Pacagnella, Rodolfo C.; Borovac‐Pinheiro, Anderson; Silveira, Carla; Morais, Sirlei Siani; Argenton, Juliana Luz Passos; Souza, João Paulo Dias de; Weeks, Andrew D.; Cecatti, José G. (International Journal of Gynecology & Obstetrics, 2022)