Cohort Profile Update: 2004 Pelotas (Brazil) Birth Cohort Study. Body composition, mental health and genetic assessment at the 6 years follow-up - Santos, IS; Barros, AJD; Matijasevich, A; Zanini, R; Chrestani, MA Cesar; Camargo-Figuera, FA; Oliveira, IO; Barros, FC; Victora, CG (Int J Epidemiol, 2014)