1 Department of Physical Therapy, Occupational Therapy, Physical Medicine and Rehabilitation, Universidad Rey Juan Carlos (URJC), Madrid, Spain. cesar.fernandez@urjc.es.
2 Department of Internal Medicine, Hospital Universitario Infanta Leonor-Virgen de la Torre, Madrid, Spain.
3 Department of Medicine, School of Medicine, Universidad Complutense de Madrid, Madrid, Spain.
4 Department of Infectious Diseases, Research Unit, Hospital Universitario Fundación Alcorcón, Madrid, Spain.
5 Department of Medicine, Universidad Rey Juan Carlos (URJC), Madrid, Spain.
6 Department of Internal Medicine, Hospital Universitario Severo Ochoa, Madrid, Spain.
7 School of Medicine, Universidad Alfonso X el Sabio, Madrid, Spain.
8 Department of Public Health, Universidad Rey Juan Carlos (URJC), Madrid, Spain.
9 Department of Internal Medicine, Hospital Universitario Fundación Alcorcón, Madrid, Spain.