Department of Dermatology, Instituto de Investigación Sanitaria Princesa (IIS-IP), Hospital Universitario de la Princesa, Madrid, Spain. Independent Researcher in Health Services Research, Madrid, Spain. Department of Cardiology, Hospital Clínico Universitario de Valencia, Valencia, Spain. Department of Dermatology, Hospital Universitario la Fe, Valencia, Spain. Department of Dermatology, Hospital Universitari Germans Trias i Pujol, Universitat Autònoma de Barcelona, Badalona, Spain. Department of Nephrology, Fundación Jiménez Díaz, Madrid, Spain. Department of Endocrinology & Clinical Nutrition, Hospitales Universitarios Quirón Madrid & Ruber Juan Bravo, Universidad Europea de Madrid, Madrid, Spain. Department of Rheumatology, Hospital Universitario 12 de Octubre, Madrid, Spain. Department of Gastroenterology and Hepatology, Hospital La Paz, Madrid, Spain. Department of Psychiatry, Hospital Infanta Leonor, Madrid, Spain. Department of Dermatology, Hospital Universitario 12 de Octubre, Madrid, Spain.