1. Department of Pathology, Gachon University Gil Hospital, Incheon, Korea.
2. Department of Pathology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea.
3. Department of Neurochiatry, Ewha Womans University Mokdong Hospital, Ewha Womans University School of Medicine, Seoul, Korea.
4. Department of Pathology, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.