1. Department of Preventive Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain
2. Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
3. Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBER-ESP), Madrid, Spain
4. Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain