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
Main Authors: | , , , , , , , , , , , |
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Format: | Online |
Language: | English |
Published: |
Public Library of Science
2013
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Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3706448/ |