Jongsuk Choi1, Sanghoon Lee2, Chan-Nyoung Lee3. 1. Department of Neurology, Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea. 2. Department of Obstetrics and Gynecology, Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea. 3. Department of Neurology, Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea. lcn001@naver.com.