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World J Biol Chem. Nov 26, 2014; 5(4): 429-436
Published online Nov 26, 2014. doi: 10.4331/wjbc.v5.i4.429
Figure 1
Figure 1 Number of publications per year with keywords “cancer pain”. From MEDLINE®/PubMed®, a database of the United States National Library of Medicine.