Concussion Subtype Identification With the Rivermead Post-concussion Symptoms Questionnaire.

Front Neurol · 2018 · PMC6287109 · PMID 30559709

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an increasing trendno p-value reported

The questionnaire was first of its kind when published in 1995, and has since been cited in hundreds of academic publications with an increasing trend.

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.