1. Internal Medicine DepartmentHospital General Universitario Gregorio MarañónUniversidad Complutense de Madrid Madrid Spain
2. Preventive Medicine and Public Health Teaching and Research UnitHealth Sciences FacultyRey Juan Carlos University Alcorcón, Madrid Spain
3. Respiratory Care DepartmentHospital General Universitario Gregorio MarañónUniversidad Complutense de MadridInstituto de Investigación Sanitaria Gregorio Marañón (IiSGM) Madrid Spain
4. Internal Medicine DepartmentHospital Universitario Clínico San CarlosUniversidad Complutense de Madrid Madrid Spain
5. Internal Medicine DepartmentHospital Universitario Infanta Leonor Madrid Spain