Positive early data on Sangamo Therapeutics Inc./Pfizer Inc.'s gene therapy for hemophilia A at a higher dose cohort have put momentum behind the program, but the partners are up against rivals BioMarin Pharmaceutical Inc. and Spark Therapeutics Inc., two companies that are further ahead in the race to bring the first gene therapy for the blood disorder to the market.
Pfizer and Sangamo reported interim data April 2 from the Phase I/II Alta study, showing SB-525 was well tolerated and...








