Evaluation of the effects of an offer of a monetary incentive on the rate of questionnaire return during follow-up of a clinical trial: a randomised study within a trial
Crossref DOI link: https://doi.org/10.1186/s12874-016-0180-9
Published Online: 2016-07-15
Published Print: 2016-12
Update policy: https://doi.org/10.1007/springer_crossmark_policy
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Hardy, Pollyanna https://orcid.org/0000-0003-2937-8368
Bell, Jennifer L.
Brocklehurst, Peter
License valid from 2016-07-15
