1. Faculty of Health, Department of Family Medicine, Universidad del Valle, Cra 119a #60b-75, Cali, Valle del Cauca 760035, Colombia
2. Faculty of Health, Department of Family Medicine, Universidad del Valle, Calle 15a #69-85, Cali, Valle del Cauca 760033, Colombia
3. Pain Medicine and Palliative Care, Clínica de Occidente S.A., Cali, Valle del Cauca, Colombia
4. Western Clinical Research and Education Group (GIECDO), Cali, Valle del Cauca, Colombia