The Burden of provider-initiated preterm birth and associated factors: evidence from the Brazilian Multicenter Study on Preterm Birth (EMIP) - Souza, Renato T.; Cecatti, José G.; Passini Júnior, Renato; Tedesco, Ricardo P.; Lajos, Giuliane J.; Nomura, Marcelo L.; Rehder, Patricia M.; Dias, Tabata Z.; Haddad, Samira M.; Pacagnella, Rodolfo C.; Costa, Maria L.; Quintana, Silvana Maria (PLOS One, 2016)