1. Department of Neurology, Inha University Hospital, Incheon, Korea.
2. Department of Critical Care Medicine, Inha University Hospital, Incheon, Korea.
3. Department of Gastroenterology, Inha University Hospital, Incheon, Korea.
4. Department of Internal Medicine, Inha University Hospital, Incheon, Korea.
5. Department of Pediatrics, Dongguk University Ilsan Hospital, Goyang, Korea.
6. Department of Neurology, Dongguk University Ilsan Hospital, Goyang, Korea.