1. Occupational Risk Prevention Unit, Álvaro Cunqueiro Hospital, 36312 Vigo, Spain
2. Occupational Risk Prevention Unit, Hospital Universitario de Móstoles, 28935 Móstoles, Spain
3. Occupational Risk Prevention Service, Hospital San Pedro, 26006 Logroño, Spain
4. Occupational Medicine Teaching Unit, Marqués de Valdecilla University Hospital, 39008 Santander, Spain
5. Foundation for the Promotion of Health and Biomedical Research in the Valencian Region (FISABIO), Health and Biomedical Research Institute of Alicante (ISABIAL), 03010 Alicante, Spain
6. Carlos III Health Institute, National School of Occupational Medicine, 28029 Madrid, Spain