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Tweetations for "Internet Versus Mailed Questionnaires: A Randomized Comparison" in the last month

Philip Ritter, Kate Lorig, Diana Laurent, Katy Matthews
J Med Internet Res 2004 (Sep 15); 6(3):e29 

ALL TIME (0)  IN THE LAST MONTH (0)  IN THE LAST SIX MONTHS (0)  IN THE LAST YEAR (0)

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