1. Department of Internal Medicine, Samsung Medical Center, Seoul 06351, Republic of Korea
2. Department of Biomedical Engineering, Pukyong National University, Busan 48513, Republic of Korea
3. Department of Internal Medicine, Kosin University College of Medicine, Busan 49267, Republic of Korea
4. Department of Thoracic and Cardiovascular Surgery, Kosin University College of Medicine, Busan 46241, Republic of Korea
5. Department of Medical Humanities and Social Medicine, Kosin University College of Medicine, Busan 46241, Republic of Korea