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Tweetations for "The Influence of Response Mode on Study Results: Offering Cigarette Smokers a Choice of Postal or Online Completion of a Survey" in the last yearPeter W Callas, Laura J Solomon, John R Hughes, Amy E Livingston
ALL TIME (5) IN THE LAST MONTH (0) IN THE LAST SIX MONTHS (0) IN THE LAST YEAR (0)
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