1. Department of Medical Science, Pusan National University School of Medicine, Yangsan, South Gyeongsang 50612, Republic of Korea
2. Department of Anatomy, Inje University College of Medicine, Busan 47396, Republic of Korea
3. Department of Pathology, Inje University Haewoondae Paik Hospital, Busan 48108, Republic of Korea
4. Division of Pulmonology, Department of Internal Medicine, Inje University Pusan Paik Hospital, Busan 47396, Republic of Korea