1. Facultad Ciencias de la Salud, Universidad del Cauca, Colombia; Departamento de Pediatria; Hospital Universitario San Jose Departamento de Pediatría Popayan Cauca Colombia NA
2. Universidad del Cauca, Colombia. Erasmus University Medical Centre Rotterdam, The Netherlands.; Departamento de Anestesiología, Universidad del Cauca, Colombia. Department of Anesthesiology, Erasmus University Medical Centre Rotterdam, The Netherlands.; Cra 2 16N-142, tercer piso Hospital Universitario San Jose Popayan Colombia
3. CIBER Epidemiología y Salud Pública (CIBERESP) - Universitat Autònoma de Barcelona; Iberoamerican Cochrane Centre - Biomedical Research Institute Sant Pau (IIB Sant Pau); Sant Antoni Maria Claret, 167 Pavilion 18 (D-13) Barcelona Catalonia Spain 08025
4. Medical School, Aristotle University of Thessaloniki; 4th Department of Paediatrics; Papageorgiou General Hospital, Ring Road Nea Efkarpia Thessaloniki Greece GR56403