Is 'self-medication' a useful term to retrieve related publications in the literature? A systematic exploration of related terms.

PLoS One · 2015 · PMC4416799 · PMID 25932634

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an increasing trendno p-value reported

Presence of SM terms in the TIAB of unrelated publications had an increasing trend until 1995 but it became almost constant after 1998.

also in 63,971 other papers

Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.