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J Epidemiol Community Health. 1997 Aug;51(4):463-4.

Cost effectiveness of a prize draw on response to a postal questionnaire: results of a randomised trial among orthopaedic outpatients in Edinburgh.

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  • 1Princess Margaret Rose Orthopaedic Hospital, Royal Infirmary of Edinburgh NHS Trust.
PMID:
9328560
[PubMed - indexed for MEDLINE]
PMCID:
PMC1060522
Free PMC Article
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