Institute of Genetics;
Fudan Uniuersity;
Shanghai 200433;
PRC;
Department of Hematology;
Changhai Hospital;
Shanghai 200433;
PRC;
Department of Biology;
Second Military Medical University;
Shanghai 200433;
PRC;
gene; therapy; retroviral; vector; clotting; factor; Ⅸ; cell-collagen; mixture; injection; expression; of; faetor; Ⅸ.;