Recruitment and retention of participants in a pragmatic randomized intervention trial at three community health clinics: results and lessons learned.
Warner ET, Glasgow RE, Emmons KM, Bennett GG, Askew S, Rosner B, Colditz GA. Recruitment and retention of participants in a pragmatic randomized intervention trial at three community health clinics: results and lessons learned. BMC Public Health. 2013 Mar 06; 13:192.