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    Open Access

    Effect of prepaid and promised financial incentive on follow-up survey response in cigarette smokers: a randomized controlled trial

    Monetary incentive is often used to increase response rate in smokers’ survey, but such effect of prepaid and promised incentives in a follow-up survey is unknown. We compared the effect of different incentive...

    Yee Tak Derek Cheung, Xue Weng, Man ** Wang… in BMC Medical Research Methodology (2019)

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