1 Department of Anesthesiology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.
2 Division of Anesthesiology, Hualien Armed Forces General Hospital, Hualien, Taiwan.
3 Department of Orthopedic, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.
4 Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.