1. Graduate Program in Endocrinology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil;
2. Endocrinology Department, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil;
3. School of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil;
4. Obstetrics Department, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.