1. Department of Critical Care, University Hospital “Virgen del Rocío,” Seville , Spain
2. Department of Pharmacy and Statistics and Design, University Hospital “Virgen Del Rocío” and Institute of Biomedicine “IBIS,” Seville , Spain
3. Critical Care Division, Autonoma Barcelona, Hospital “San Juan de Dios” del Aljarafe, Bormujos , Seville , Spain