1. Laboratory of Chemical Carcinogenesis and Pharmacogenetics, Department of Basic-Clinical Oncology, Faculty of Medicine, University of Chile, Santiago, Chile & Latin American Network for the Implementation and Validation of Clinical Pharmacogenomics Guidelines (RELIVAF-CYTED), Madrid, Spain
2. Otorhinolaryngology Service, Barros Luco Hospital, Santiago, Chile
3. School of Public Health, Faculty of Medicine, University of Chile, Santiago, Chile
4. Health Science Faculty, Tarapacá University, Iquique, Chile