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1471-2288-11-145
1471-2288-11-145
http://dx.doi.org/10.1186/1471-2288-11-145
Predicting complete loss to follow-up after a health-education program: number of absences and face-to-face contact with a researcher.
P356
Q34060042-8B26E16D-417E-47F3-B033-0CB0A9C0A140
P356
1471-2288-11-145
http://dx.doi.org/10.1186/1471-2288-11-145