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Clinical observations of patient-controlled butorphanol intravenous analgesia following surgery to remove malignant tumors from the lymph node basin and abdomen
LI Yang,QIAN Wei,DU Xue-ke,PENG Dan-hui,PEI Sheng-lin,CHEN Xiao-dong,PAN Ling-hui,HUANG Bing
Chinese Journal of Oncology Prevention and Treatment . 2014, (3): 257 -260 .  DOI: 10.3969/j.issn.1674-5671.2014.03.08