Application of low-dose nalmefene in postoperative patient-controlled intravenous analgesia of elderly patients with hip fracture
Wu Dong, Cheng Bin, Gao Maolong, Zhao Jiaxun
Journal of Capital Medical University . 2016, (2): 241 -244 .  DOI: 10.3969/j.issn.1006-7795.2016.02.026