Collagenase treatments are still undergoing tests required for FDA approval and are available only through a few locations--Stoneybrook and Stanford most notably. As I understand it from my Orthopedist, the process involves multiple sessions of injecting collagenase until the fascia tissue ruptures--similar to NA (advantage: supposedly less risk; disadvantage: no telling when it will be approved and how long after that it will become generally available nor how costs will compare with NA).