Changes in Infant and Neonatal Mortality and Associated Factors in Eight Cohorts from Three Brazilian Cities oleh Carolina A. Carvalho, Antônio A. M. da Silva, César Victora, Marcelo Goldani, Heloísa Bettiol, Erika Barbara Abreu Fonseca Thomaz, Fernando Barros, Bernardo L. Horta, Ana Menezes, Viviane Cardoso, Ricardo Carvalho Cavalli, Iná Santos, Rosângela F. L. Batista, Vanda Maria Simões, Marco Barbieri, Aluisio Barros