1 Department of Neurology (Ho), Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan; Division of Chest Medicine (Wang), Department of Internal Medicine, Taichung Veterans General Hospital Puli Branch, Nantou, Taiwan.
2 Department of Neurology (Ho), Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan; Division of Chest Medicine (Wang), Department of Internal Medicine, Taichung Veterans General Hospital Puli Branch, Nantou, Taiwan proteinmad@yahoo.com.tw.