Atlas (http://bbmri.researchlumc.nl/atlas/#data). Mean cell counts for eight immune cell types from 1M-scBloodNL cohort are available in Source Data 2. Per-cohort individual-level genotype and gene expression data is governed by respective biobanks and access can be requested according to procedures established by each biobank, with relevant restrictions applying as imposed by IRB or local legislation. Data access procedures established for BIOS Consortium are available on https://www.bbmri.nl/acquisition-use-analyze/bios.