1. Department of Physiology, Universidad Nacional De Colombia, Bogota, Colombia
2. Department of Anesthesiology, Centro Policlínico del Olaya, Bogota, Colombia
3. Department of Anesthesiology, Fundación Santa Fe de Bogotá, Bogota, Colombia
4. Department of Critical Care, Hospital SAS de Jerez, Jerez de la Frontera, Cádiz, Spain