Andraca, Isidora de, Paulina Pino, Alicia de La Parra, Francisca Rivera, and Marcela Castillo. “ Risk Factors for Psychomotor Development Among Infants Born under Optimal Biological Conditions ”. Revista de Saúde Pública 32, no. 2 (April 1, 1998): 138–147. Accessed May 6, 2024. https://www.revistas.usp.br/rsp/article/view/24358.