Previous to this study, 106 individuals from the cohort had their genomes sequenced to high coverage (TruSeq Nano libraries sequenced on HiSeqX) and 1293 individuals were genotyped using Illumina Infinium CoreExome arrays (v1.0–1.3) [34 (link)]. We reprocessed the 106 whole genomes to obtain joint variant calls as detailed below. For the array data, GRCh37 genotype calls were lifted over to GRCh38, resulting in 471,499 genotyped positions on autosomes which were then further imputed into the 1000 Genomes mapped onto GRCh38 reference panel [49 (link)] using Beagle v5.1 [30 (link)] (beagle.27Apr20.b81.jar).
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