The effects of preemptive analgesia with nalbuphine on postoperative pain in elder patients undergoing surgery of oral and maxillofacial neoplasms
ZHU Hao-zhen, SUN Yu
China Journal of Oral and Maxillofacial Surgery . 2019, (4): 316 -318 .  DOI: 10.19438/j.cjoms.2019.04.006