1. School of Medicine, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
2. Gynecology and Obstetrics Unit, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Brazil
3. Biostatics Unit, HCPA, Porto Alegre, Brazil
4. Endocrinology and Metabolism Unit, HCPA, Porto Alegre, Brazil