1. Department of Pulmonary, Allergy and Critical Care Medicine, Pusan National University Yangsan Hospital, The Research Institute for Convergence of Biomedical Science and Technology; Pusan National University Yangsan Hospital; Yangsan Korea
2. Department of Thoracic and Cardiovascular Surgery, Pusan National University Yangsan Hospital, The Research Institute for Convergence of Biomedical Science and Technology; Pusan National University Yangsan Hospital; Yangsan Korea