1. Sleep Unit, Department of Respiratory Medicine, Hospital Universitari de Bellvitge, Hospitalet de Llobregat, Spain
2. Bellvitge Biomedical Research Institute (IDIBELL). Area: Inflammatory, Chronic and Degenerative Diseases. Section: Respiratory Medicine. Hospitalet de Llobregat, Spain
3. Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
4. CIBER Enfermedades Respiratorias (CibeRes) (CB06/06), Spain
5. Sleep Unit, Department of Respiratory Medicine, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
6. Department of Endocrinology and Nutrition, Hospital de la Santa Creu i Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain
7. CIBER de diabetes y Enfermedades Metabólicas (CIBERDEM), Spain
8. Biomedical Department of Internal and Specialistic Medicine (DIBIMIS), University of Palermo, Italy
9. Department of Endocrinology and Nutrition, Hospital Universitari de Bellvitge, Hospitalet de Llobregat, Spain
10. Sleep Unit. Department of Respiratory Medicine, Hospital Clinic de Barcelona, Barcelona, Spain