A Bibliometric Analysis of Publications on Oxycodone from 1998 to 2017

Figure 6

Analysis of keywords in oxycodone-related publications. (a) The analysis of co-occurrence keywords during two decades. (b) The density map of keywords in the past 20 years. (c) The analysis of co-occurrence keywords between 1998 and 2007. (d) The analysis of co-occurrence keywords between 2008 and 2017.

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