(Q50166422)
Statements
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Assessing representativeness of sampling methods for reaching men who have sex with men: a direct comparison of results obtained from convenience and probability samples. (English)
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Linda Valleroy
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Sandra Schwarcz
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Hilary Spindler
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Susan Scheer
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Amy Lansky
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11 April 2007
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11
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4
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596-602
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