Document Type : LETTER TO THE EDITOR
Authors
1 Department of Orthopedic Surgery, Hualien Armed Forces General Hospital, Taiwan/Department of Orthopedic Surgery, National Defense Medical Center, Tri-Service General Hospital, Taipei, Taiwan
2 Department of anesthesiology, Shahid Beheshti University of Medical Science, Tehran, Iran
3 Clinical Research and Development Unit, Department of Anesthesiology, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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