Figure 1: Number of publications annotated on PubMed database from the US National Library of Medicine. Search was performed using the following terms: “miRNA” OR “microRNA” AND “cancer” AND “lung”. Red line represents the cumulative number of entries (between 2004 and 2011). Blue line indicates number of entries per year. Green dotted line indicates the results of the same search with “biomarker” as an additional search term.