1. Department of Endocrinology and Nutrition; Hospital Universitari Mútua de Terrassa; Terrassa Spain
2. Department of Endocrinology and Nutrition; Hospital de la Santa Creu i Sant Pau; Barcelona Spain
3. Department of Obstetrics and Gynaecology; Hospital de la Santa Creu i Sant Pau; Barcelona Spain
4. CIBER Bioengineering, Biomaterials and Nanotechnology (CIBER-BBN); Instituto de Salud Carlos III; Zaragoza Spain
5. Department of Medicine; Universitat Autònoma de Barcelona; Bellaterra (Cerdanyola del Vallès) Spain