Circulating interleukin-27 is associated with the risk of chronic periodontitis and allergic rhinitis: A Mendelian randomization analysis. Nan Jiang JingLi Zhao ChuHuan Zhou XinRong Nan a School of Stomatology, Shanxi Medical University, Taiyuan, Taiyuan, Chinab Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, Chinac The First Affiliated Hospital of Shanxi Medical University, Taiyuan, China