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. 2019 Dec 13;7:418. doi: 10.3389/fbioe.2019.00418

Figure 1.

Figure 1

The PUBMED search tool was used to find relevant keywords in the title or main body of the article. For example, quotes were used to search for “chronic wounds” as a single term. Further, the AND operation was used to search for papers that had both “chronic wounds” as a term and the word biofilms. A similar strategy was used for all the other searches.