The development of a simplified, effective, labour monitoring-to-action (SELMA) toor for better outcomes in labour difficulty (BOLD): study protocol - Souza, João Paulo; Oladapo, Olufemi; Bohren, Meghan A; Mugerwa, Kidza; Fawole, Bukola; Moscovici, Leonardo; Alves, Domingos; Perdona, Gleici; Oliveira-Ciabati, Livia; Vogel, Joshua P; Tunçalp, Özge; Zhang, Jim; et al. (Reproductive Health, 2015)