1 The Department of Anesthesiology and Intensive Care Medicine, Clinical University Hospital of Santiago. Sanitary Research Institute of Santiago (IDIS), Spain. Electronic address: manuel.taboada.muniz@sergas.es.
2 The Department of Anesthesiology and Intensive Care Medicine, Clinical University Hospital of Santiago. Sanitary Research Institute of Santiago (IDIS), Spain.
3 The Department of Anesthesiology and Intensive Care Medicine, Clinical University Hospital of Ferrol, Spain.
4 The Department of Pneumology, Clinical University Hospital of Santiago. Sanitary Research Institute of Santiago (IDIS), Spain.
5 The Department of Anesthesiology and Intensive Care Medicine, Clinical University Hospital of Santiago. Sanitary Research Institute of Santiago (IDIS), Spain; The Department of Internal Medical, Clinical University Hospital of Santiago. Sanitary Research Institute of Santiago (IDIS), Spain.
6 The Preventive Medicine and Public Health Unit, department of Health Sciences, University of A Coruña-INIBIC, A Coruña, Spain.