1 Department of Geriatric, Hospital Universitario Rey Juan Carlos, Móstoles, Spain.
2 Health Research Institute Fundación Jimenez Diaz, Madrid, Spain.
3 Department of Geriatric, Hospital General Universitario Gregorio Marañón, Consortium of Biomedical Research Centers Network Fragility and Healthy Aging (CIBERFES), Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain.
4 Department of Medicine, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain.