The effect of a direct payment or 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
Publication statusPublished - 2000

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