Long-term expression of human coagulation factor VIII and correction of hemophilia A after in vivo retroviral gene transfer in factor VIII-deficient mice - VandenDriessche, T; Vanslembrouck, V; Goovaerts, I; Zwinnen, H; Vanderhaeghen, M-L; Collen, D; Chuah, MKL (Proc Natl Acad Sci USA, 1999)