Comparison between Demerol and Tramadol for treating chill in epidural anesthesia .
Comparison between Demerol and Tramadol for treating chill in epidural anesthesia .
哌替啶、曲马多治疗硬膜外麻醉中寒战的比较
Comparison between Demerol and Tramadol for treating chill in epidural anesthesia .
哌替啶、曲马多治疗硬膜外麻醉中寒战的比较