Bidirectional Causality Between Atopic Diseases and Nephrotic Syndrome: A Mendelian Randomization StudyXu Zheng1*, Yue Zheng2*, Zijing Wang3, Jingxin Ma1, Moli Wu1, Kaili Zhang1, Yue Du21Department of Medical Cell Biology, College of Basic Medical Sciences, Dalian Medical University, Dalian, China2 Department of Pediatrics, Shengjing Hospital of China medical university, Shenyang, China3Dalian Women and Children’s Medical Centre (Group), Dalian, China*Authors contributing equally to this article.