Chen, C. L.C. L.ChenHuang, C. H.C. H.HuangLin, Shian-YeangShian-YeangLinChang, G. L.G. L.Chang孫維仁黃啟祥2009-02-122018-07-132009-02-122018-07-131993-03http://ntur.lib.ntu.edu.tw//handle/246246/130012en-USDifferential Concentration Effect for Postoperative Pain by Epidural Patient-Controlled Fentanyl Analgesia:a Preliminary Report