1. Department of Internal Medicine, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang, Korea.
2. Department of Neurology, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang, Korea.
3. Department of Radiology, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang, Korea.