CTSH and myasthenia gravis: A SD increase in genetically predicted circulating CTSH abundance was found to be associated with an elevated risk of MG (minimum OR = 1.218; 95% CI 1.101–1.348; P = 1.329 × 10–4), and this trend was consistently observed in both the UK Biobank (OR = 1.275; 95% CI 1.003–1.620; P = 4.713 × 10–2) and FinnGen Biobank (OR = 1.185; 95% CI 1.017–1.381; P = 2.942 × 10–2) datasets (Additional file 1: Figure S3).