Wu W, Xiao L, Wu X, Xie X, Li P, Chen C, Zheng Z, Ai J, Alexander Valencia C, Dong B, Ding Q, Dong B, Wang X. Factor IX alteration p.Arg338Gln (FIX Shanghai) potentiates FIX clotting activity and causes thrombosis. Haematologica 2021;106(1):264-268; https://doi.org/10.3324/haematol.2019.216713.