Does pre-notification increase questionnaire response rates: a randomised controlled trial nested within a systematic review

Woolf, Benjamin; Edwards, Phil; (2021) Does pre-notification increase questionnaire response rates: a randomised controlled trial nested within a systematic review. BMC MEDICAL RESEARCH METHODOLOGY, 21 (1). p. 259. ISSN 1471-2288 DOI: https://doi.org/10.1186/s12874-021-01462-z

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