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JOURNAL.PONE.0067912
JOURNAL.PONE.0067912
http://dx.doi.org/10.1371/JOURNAL.PONE.0067912
Volunteer bias in recruitment, retention, and blood sample donation in a randomised controlled trial involving mothers and their children at six months and two years: a longitudinal analysis.
P356
Q36996957-DFF5497F-80D8-4218-8E74-48880AA7C2F8
P356
JOURNAL.PONE.0067912
http://dx.doi.org/10.1371/JOURNAL.PONE.0067912