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Flowchart of the present Mendelian randomization study. IIBDGC International Inflammatory Bowel Disease Genetics Consortium, SNP single nucleotide polymorphism, UC ulcerative colitis, CD Crohn’s disease, eGFRcrea estimated glomerular filtration rate from serum creatinine, uACR urine albumin to creatinine ratio, CKD chronic kidney disease, WM weighted median, LOO leave-one-out
