Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea. Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea. Department of Internal Medicine, Busan Paik Hospital Inje University College of Medicine, Pusan, South Korea. Department of Internal Medicine, Inha University College of Medicine, Incheon, South Korea. Utah-Inha DDS and Advanced Therapeutics Research Center, Incheon, South Korea. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea. Department of Radiology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.