Corrigendum: Trends and Inequalities in Unplanned Pregnancy in Three Population-Based Birth Cohorts in Pelotas, Brazil - Laísa Rodrigues Moreira; Fernanda Ewerling; Fernanda Ewerling; Iná S. dos Santos; Fernando César Wehrmeister; Fernando César Wehrmeister; Alicia Matijasevich; Alicia Matijasevich; Aluisio J. D. Barros; Aluisio J. D. Barros; Ana M. B. Menezes; Helen Gonçalves; et al. (Frontiers Media S.A., 2021)