Spinal muscular atrophy (SMA) therapy Spinraza has been a key earner for Biogen in recent years, but with sales now heading into reverse, the company is looking to extend its franchise.

As a foundation of care in SMA, more than 14,000 individuals have been treated with SPINRAZA worldwide.1 The currently approved 12 mg regimen for SPINRAZA is comprised of four loading doses ...