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Over time increase in the number of publications using “systems biology” compared with total articles in PubMed during 2001–2009. The gray bars show the number of articles indexed in PubMed per year that were labeled with the medical subject heading (MeSH) “systems biology” as a reference, the gold dashed line shows the number of total articles indexed in PubMed per year. Adapted from reference 32 with permission.
