Figure 1.
Flowchart of the sampling strategies.
Gama et al. BMC Medical Research Methodology 2009 9:45 doi:10.1186/1471-2288-9-45
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Figure 1.
Flowchart of the sampling strategies.
Gama et al. BMC Medical Research Methodology 2009 9:45 doi:10.1186/1471-2288-9-45 |
