1. Intensive Care Unit; Central University Hospital of Asturias; Oviedo Spain
2. Spanish National Transplant Organization (ONT); Madrid Spain
3. Intensive Care Unit; Gregorio Marañón University Hospital; Madrid Spain
4. Intensive Care Unit; Virgen de la Arrixaca Hospital; Murcia Spain
5. Unit of Transplants, Cell Therapy and Regenerative Medicine; Central University Hospital of Asturias; Oviedo Spain
6. Intensive Care Unit; Son Espases University Hospital; Palma de Mallorca Spain
7. Intensive Care Unit; Vall D′Hebron Hospital; Barcelona Spain
8. Intensive Care Unit; Infanta Cristina University Hospital; Badajoz Spain
9. Intensive Care Unit; Carlos Haya Hospital; Málaga Spain
10. Intensive Care Unit; Virgen de las Nieves University Hospital; Granada Spain
11. Intensive Care Unit; La Fe University Hospital; Valencia Spain
12. Intensive Care Unit; La Paz University Hospital; Madrid Spain
13. Intensive Care Unit; Miguel Servet University Hospital; Zaragoza Spain
14. Intensive Care Unit; General Yagüe Hospital; Burgos Spain
15. Intensive Care Unit; Marqués de Valdecilla University Hospital; Santander Spain
16. Intensive Care Unit; Asistential Complex of Navarra; Pamplona Spain
17. Intensive Care Unit; 12 de Octubre University Hospital; Madrid Spain