From the 1Postgraduate Program in Medicine: Medical Sciences, School of Medicine, Federal University of Rio Grande do Sul, RS, Brazil; 2Department of Obstetrics and Gynecology, Passo Fundo University, Passo Fundo, RS, Brazil; 3Department of Social Medicine, School of Medicine, Federal University of Rio Grande do Sul, RS, Brazil; and 4Gynecological Endocrinology Unit, Division of Endocrinology, Hospital de Clinicas de Porto Alegre and Department of Physiology, Institute of Health Basic Sciences, Federal University of Rio Grande do Sul, RS, Brazil.
Received April 14, 2005; revised and accepted July 5, 2005.
This study was supported in part by grants from Conselho Nacional de Pesquisa (CNPq).
Address correspondence to: Sandra Costa Fuchs, MD, PhD, Faculdade de Medicina, UFRGS, Rua Ramiro Barcelos, 2400 2º Andar, 90035-003 Porto Alegre, RS, Brazil. E-mail: [email protected].