Affiliation: | 1. Division of Cardiology, Department of Medicine, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea;2. Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea;3. Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Republic of Korea;4. Department of Neurology, Yonsei University College of Medicine, Seoul, Republic of Korea |