Resolution: standard / high
Figure 1.
Breakdown of NWTS* cohort by January 1, 2002 vital status and NDI* match status.
* NWTS, National Wilms Tumor Study; NDI, National Death Index.
† Record not sent to the NDI due to an error in date last seen which was later corrected.
Cotton et al. Epidemiologic Perspectives & Innovations 2007 4:5 doi:10.1186/1742-5573-4-5
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