(Q34089775)
Statements
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Recruiting patients to medical research: double blind randomised trial of "opt-in" versus "opt-out" strategies (English)
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Adam Timmis
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Harry Hemingway
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Cornelia Junghans
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Gene Feder
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Melvyn Jones
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12 September 2005
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331
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7522
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940
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Identifiers
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