1 Department of Anesthesiology and Intensive Care Medicine, Clinical University Hospital of Santiago, Sanitary Research Institute of Santiago (IDIS), Spain.
2 Department of Anesthesiology and Intensive Care Medicine, Clinical University Hospital of Ferrol, Spain.
3 Department of Anesthesiology and Intensive Care Medicine, Hospital POVISA of Vigo, Spain.
4 Department of Anesthesiology and Intensive Care Medicine, Clinical University Hospital of Vigo, Spain.
5 Department of Anesthesiology and Intensive Care Medicine, Clinical University Hospital of Pontevedra, Spain.
6 Department of Anesthesiology and Intensive Care Medicine, Clinical University Hospital of A Coruña, Spain.
7 Department of Anesthesiology and Intensive Care Medicine, Clinical University Hospital of Ourense, Spain.
8 Preventive Medicine and Public Health Unit, Department of Health Sciences, University of A Coruña-INIBIC, A Coruña, Spain.