1. Divission of Pain Medicine, Department of Anesthesiology, University of Antioquia, Medellin, Colombia
2. Department of Critical Medicine and Intensive Care, Gestión Salud IPS, Cartagena, Colombia
3. Department of Critical Medicine and Intensive Care, Nuevo Hospital Bocagrande, Cartagena, Colombia
4. Department of Epidemiology and Public Health, BIOTOXAM Group, Universidad de Cartagena, Cartagena, Colombia