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    					| Effects of Preemptive Analgesia on the Expression of OPG/RANKL Signaling Pathway Factors in Patients with Calcaneal Intra-articular Fractures |  
						| LU Zhiyong, SHEN Jieying |  
						| First-author's address: Suzhou TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Suzhou 215000, China |  
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