1. Department of Medicine and Psychiatry, University of Cantabria, Spain
2. Department of Nursing, Marques de Valdecilla University Hospital, Spain
3. Department of Structural and Mechanical Engineering, University of Cantabria, Spain
4. Department of Prevention of Occupational Risks, Marques de Valdecilla University Hospital, Spain
5. Department of Medical and Surgical Sciences, University of Cantabria, Spain
6. Colorectal Unit, Marques de Valdecilla University Hospital, Spain