The role of maternal infection in preterm birth: evidence from the Brazilian Multicentre Study on Preterm Birth (EMIP) - Tedesco, R P; Galvão, R B; Guida, J P; Passini-Júnior, R; Lajos, G J; Nomura, M L; Group Brazilian Multicentre Study on Preterm Birth Study (Clinics (São Paulo), 2020)