1. Intensive Care Unit, Hospital Universitario De Canarias. Ofra, Santa Cruz de Tenerife, Spain
2. Intensive Care Unit, Hospital Universitario Nuestra Señora De Candelaria, Santa Cruz de Tenerife, Spain
3. Laboratory Department. Hospital Universitario De Canarias. Ofra, Santa Cruz de Tenerife, Spain
4. Laboratory Department, Hospital Universitario de Canarias. Ofra, Tenerife, Spain
5. Intensive Care Unit, Complejo Hospitalario Universitario Insular, Las Palmas de Gran Canaria, Spain
6. Internal Intensive Care Unit, Hospital Universitario de Canarias. Ofra, Santa Cruz de Tenerife, Spain
7. Intensive Care Unit. Hospital General La Palma, Breña Alta, la Palma, Spain
8. Intensive Care Unit, Hospital Universitario, Las Palmas de Gran Canaria, Spain
9. Intensive Care Unit, Hospital Doctor José Molina Orosa, Arrecife. Lanzarote, Spain
10. Department of Anesthesiology, Hospital Universitario, Las Palmas de Gran Canaria, Spain
11. Research Unit, Hospital Universitario de Canarias. Ofra, Santa Cruz de Tenerife, Spain