1. Department of Endocrinology & Nutrition. Germans Trias i Pujol University Hospital, Badalona, Spain
2. Institute for Health Science Research Germans Trias i Pujol (IGTP), Badalona, Spain
3. Department of Medicine, Autonomous University of Barcelona, Badalona, Spain
4. Department of Obstetrics & Gynecology, Germans Trias i Pujol University Hospital, Badalona, Spain
5. Health Department, Centre d’Estudis Epidemiològics sobre les Infeccions de Transmissió Sexual i Sida de Catalunya (CEEISCAT), Generalitat de Catalunya, Badalona, Spain