Figure 1
From: Association of ARNTL and PER1 genes with Parkinson's disease: a case-control study of Han Chinese
Principal component analysis on 1,394 cases and 1,342 controls using 125 QC-passed SNPs.
We plotted the first and second principal components to show the range of the studied samples. The percentages of variance accounted for by the two components are indicated in brackets. The sample affiliation is shown by different symbols in red (cases) or green (controls).
