Conducting physician mail surveys on a limited budget. A randomized trial comparing $2 bill versus $5 bill incentives. (Q48731098)
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English | Conducting physician mail surveys on a limited budget. A randomized trial comparing $2 bill versus $5 bill incentives. |
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Conducting physician mail surveys on a limited budget. A randomized trial comparing $2 bill versus $5 bill incentives. (English)
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Christakis NA
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Ubel PA
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1 January 1998
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36
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1
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95-99
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