Fig. 4From: Causal relationships between type 1 diabetes mellitus and Alzheimer’s disease and Parkinson’s disease: a bidirectional two-sample Mendelian randomization studyA Funnel plots of the association between T1DM and AD. B Funnel plots of the association between T1DM and PD. The dark blue line represents MR-Egger and the light blue line represents IVWBack to article page