1. Department of Surgery, Faculty of Medicine, University of Valladolid, Valladolid, Spain
2. Biomedical Engineering Group, University of Valladolid, Valladolid, Spain
3. Group for Biomedical Research in Critical Care Medicine (BioCritic), Valladolid, Spain
4. Unit of Viral Infection and Immunity, National Center for Microbiology (CNM), Health Institute Carlos III (ISCIII), Majadahonda, Spain