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. Author manuscript; available in PMC: 2021 Mar 1.
Published in final edited form as: Lancet Respir Med. 2020 Jan 23;8(3):258–266. doi: 10.1016/S2213-2600(19)30368-6

Figure 1. Flow chart of quality control steps for the samples and genotyped SNPs in the discovery and replication stages.

Figure 1.

CR, Call rate; DQC, Affymetrix dish quality control; FLD, Fisher’s Linear Discriminant; HetSO, Heterozygous Cluster Strength Offset; HWE, Hardy-Weinberg Equilibrium; MAF, minor allele frequency; mtDNA, mitochondrial DNA; Y-chr, Y chromosome.