1. Division of Pulmonology, Department of Internal Medicine, Pusan Paik Hospital, Inje University College of Medicine, Busan, Korea.
2. Department of Pathology, Pusan Paik Hospital, Inje University College of Medicine, Busan, Korea.
3. Department of Diagnostic Radiology, Pusan Paik Hospital, Inje University College of Medicine, Busan, Korea.
4. Department of Obstetrics and Gynecology, Pusan Paik Hospital, Inje University College of Medicine, Busan, Korea.