1. Department of Internal Medicine, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, Yangsan, Korea.
2. BioMedical Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea.
3. Department of Cardiovascular and Thoracic Surgery, Pusan National University Yangsan Hospital, Yangsan, Korea.
4. Department of Dermatology, Pusan National University Hospital, Busan, Korea.