@article{article, title  = {{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}},

 url = {{http://eprints.whiterose.ac.uk/131113/ }},

 year = {{2016}},

 month = {{7}},

 author = {{Hardy P and Bell JL and Brocklehurst P}},

 doi = {{10.1186/s12874-016-0180-9}},

 volume = {{16}},

 journal = {{BMC Medical Research Methodology}},

 issue = {{1}},

 note = {{Accessed on 2024/12/22}}}