Chunk #27 — GWAS Analysis — Quality Control (QC)
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One of the most crucial and time-consuming steps in conducting a GWAS is QC, the removal of SNPs and subjects with unreliable data plus assessment of biases that might lead to spurious results. Excellent reviews of GWAS QC are available (McCarthy et al., 2008, Neale and Purcell, 2008, Attia et al., 2009b).