Chunk #5 — Methods — Samples and genotypes

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Identification of risk loci with shared effects on five major psychiatric disorders: a genome-wide analysis.

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To ensure comparability between samples, raw genotype and phenotype data for each study were uploaded to a central server and processed through the same quality control, imputation, and analysis process (appendix).6,7 We analysed imputed SNP dosages from 1 250 922 autosomal SNPs.