Open Access Open Badges Research article

Recruitment and retention of participants in a pragmatic randomized intervention trial at three community health clinics: Results and lessons learned

Erica T Warner*, Russell E Glasgow, Karen M Emmons, Gary G Bennett, Sandy Askew, Bernard Rosner and Graham A Colditz

BMC Public Health 2013, 13:192  doi:10.1186/1471-2458-13-192

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