1. Department of Respiratory Medicine, Autonomous University of Baja California School of Medicine and Psychology, Tijuana, Mexico; National System of Researchers, Conacyt, México
2. Department of Respiratory Medicine, Autonomous University of Baja California School of Medicine and Psychology; Clinic of Tuberculosis, Tijuana General Hospital, Tijuana, México
3. Department of Respiratory Medicine, Autonomous University of Baja California School of Medicine and Psychology, Tijuana, Mexico,Clinic of Tuberculosis, Tijuana General Hospital, Tijuana, México