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Approximate number of publications per year relating to small non-coding RNA (left y-axis) and Y RNA (right y-axis), respectively. Data are the number of hits on a Thomson Reuters Web of Science topic search for the phrases ‘small non-coding RNA’ and ‘Y RNA’ (including ‘YRNA’, ‘RoRNP’, ‘Ro RNP’ and ‘Y5 RNA’ with white space characters).
