Systematic Mendelian randomization study of the effect of gut microbiome and plasma metabolome on severe COVID-19 oleh Han Yan, Si Zhao, Si Zhao, Si Zhao, Si Zhao, Han-Xue Huang, Han-Xue Huang, Han-Xue Huang, Han-Xue Huang, Pan Xie, Pan Xie, Pan Xie, Pan Xie, Xin-He Cai, Xin-He Cai, Xin-He Cai, Xin-He Cai, Yun-Dan Qu, Yun-Dan Qu, Yun-Dan Qu, Yun-Dan Qu, Wei Zhang, Wei Zhang, Wei Zhang, Wei Zhang, Jian-Quan Luo, Longbo Zhang, Longbo Zhang, Longbo Zhang, Xi Li, Xi Li, Xi Li, Xi Li