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Gonçalves, Helen, Ana L. Gonçalves Soares, Isabel O. Bierhals, Adriana K.F Machado, Mayra P. Fernandes, Roberta Hirschmann, Thais M. da Silva, Fernando C. Wehrmeister, and Ana M.B Menezes. "Age of Sexual Initiation and Depression in Adolescents: Data From the 1993 Pelotas (Brazil) Birth Cohort." J Affect Disord 2017.

Gonçalves, Helen, et al. "Age of Sexual Initiation and Depression in Adolescents: Data From the 1993 Pelotas (Brazil) Birth Cohort." J Affect Disord 2017.