1. Department of Pharmacy Practice, Tri-Service General Hospital, Taipei 114, Taiwan
2. School of Pharmacy, National Defense Medical Center, Taipei 114, Taiwan
3. Department of Biology and Anatomy, National Defense Medical Center, Taipei 114, Taiwan
4. Department of Otolaryngology-Head and Neck Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei 114, Taiwan
5. Division of Neurology, Department of Medicine, Armed Forces Taoyuan General Hospital, Taoyuan 325, Taiwan
6. Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan