ALB and atrial fibrillation: Liao et al. [22] conducted a large-scale epidemiological and mendelian randomization (MR) study to evaluate the causal influence of the serum ALB and incident AF; their results demonstrated that although serum ALB was inversely related to the incidence of AF after multiple adjustments, no evidence of a causal relationship between serum ALB levels and AF was found in Mendelian randomization (MR) analysis.