Low birthweight and preterm birth: trends and inequalities in four population-based birth cohorts in Pelotas, Brazil, 1982-2015 - Silveira, Mariangela F; Victora, Cesar G; Horta, Bernardo L; Silva, Bruna G. C. da; Matijasevich, Alicia; Barros, Fernando C; Barros, Aluisio J. D; Menezes, Ana M. B; Bertoldi, Andrea Damaso; Bassani, Diego G (International journal of epidemiology, 2019)