1. Internal Medicine and Pulmonology, Universidad Tecnológica de Pereira, Pereira, Colombia;
2. Pulmonology, Fundación Universitaria Visión de las Américas, Pereira, Colombia;
3. Department of Smoking Cessation, Asociación Latinoamericana del Tórax, Uruguay; and
4. Pulmonary Division, Department of Pediatrics, Baylor College of Medicine and Texas Children’s Hospital, Houston, Texas