(Q30484389)

English

Comparison of trial participants and open access users of a web-based physical activity intervention regarding adherence, attrition, and repeated participation

scientific article

Statements

Comparison of trial participants and open access users of a web-based physical activity intervention regarding adherence, attrition, and repeated participation (English)
Eva Martin-Diener
Georg Bauer
Brian W Martin
10 February 2010

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