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Figure 1.
Sample Representation and Retention: CONSORT Chart.
Chang et al. BMC Public Health 2009 9:424 doi:10.1186/1471-2458-9-424
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Resolution: standard / high Figure 1.
Sample Representation and Retention: CONSORT Chart.
Chang et al. BMC Public Health 2009 9:424 doi:10.1186/1471-2458-9-424 |