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Number of NIH grants (1986–2009) that contained the terms ‘biomarker’ or ‘biomarker and discovery’, as derived from the NIH RePORT database (http://projectreporter.nih.gov/reporter.cfm). A similar trend is obtained when PubMed is searched for scholarly publications containing the term ‘biomarker’ over the same time-frame. Reproduced with permission from Ptolemy & Rifai (2010).
