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Cost-effectiveness of tailored print communication, telephone motivational interviewing, and a combination of the two: results of an economic evaluation alongside the Vitalum randomized controlled trial
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* Corresponding author: Hilde M van Keulen hilde.vankeulen@tno.nl
International Journal of Behavioral Nutrition and Physical Activity 2010, 7:64 doi:10.1186/1479-5868-7-64