Department of Neurology, Wonju Christian Hospital, Yonei University Wonju College of Medicine, Wonju-si, Gangwon-do, Korea, Republic of
Department of Neurology, National Health Insurance Corporation Ilsan Hospital, Goyang-si, Gyeonggi-do, Korea, Republic of
Department of Neurology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam-si, Gyeonggi-do, Korea, Republic of
Gangnam Severance Hospital : Family medicine department, Seoul, Korea, Republic of