1. Graduate Program in Medical Sciences: Endocrinology, Department of Internal Medicine, Faculty of Medicine Universidade Federal do Rio Grande do Sul Porto Alegre Brazil
2. Division of Endocrinology and Metabolism Hospital de Clínicas de Porto Alegre Porto Alegre Brazil
3. Laboratory Diagnosis Division, Clinical Biochemistry Unit Hospital de Clínicas de Porto Alegre Porto Alegre Brazil
4. Department of Psychiatry Queens University School of Medicine Kingston Ontario Canada