Improving response rates using a monetary incentive for patient completion of questionnaires : an observational study

Brealey, S D, Atwell, C, Bryan, S, Coulton, S, Cox, H, Cross, B, Fylan, F, Garratt, A, Gilbert, F J, Gillan, M G C, Hendry, M, Hood, K, Houston, H, King, D, Morton, V, Orchard, J, Robling, M, Russell, I T, Torgerson, D, Wadsworth, V & Wilkinson, C 2007, 'Improving response rates using a monetary incentive for patient completion of questionnaires : an observational study', BMC Medical Research Methodology, vol. 7, 12. https://doi.org/10.1186/1471-2288-7-12