Fig. 2From: Bayesian mendelian randomization with study heterogeneity and data partitioning for large studiesGraphical model of Mendelian randomisation with outcomes Y1 and Y2, exposures X1 and X2 and unobserved confounder U. Z1 consists of L instrumental variables of X1 and Z2 consists of K instrumental variables of X2. In addition, Z3 consists of M instrumental variables shared between X1 and X2. The instrumental variables are assumed to be mutually independentBack to article page