The effect of a direct payment or a lottery on questionnaire response rates: a randomised controlled trial

P J Roberts, C Roberts, B Sibbald, D J Torgerson

Research output: Contribution to journalArticlepeer-review

Original languageEnglish
Pages (from-to)71-72
Number of pages2
JournalJournal of epidemiology and community health
Volume54
Issue number1
Publication statusPublished - Jan 2000

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