Blar i Department of Clinical Medicine på emneord "randomized control trial"
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No increase in response rate by adding a web response option to a postal population survey: A randomized trial
(Peer reviewed; Journal article, 2007-12-31)Background: There is substantial interest in use of the Internet for surveys, but there have been few health-oriented, large, randomized trials of general population surveys on the Internet. It is unclear whether providing ...