FDA seems poised to approve a new drug for ALS, but does it work?
In March, experts who advise the FDA questioned the efficacy of an experimental new drug for ALS. In September, they voted to approve it anyway.
(Image credit: Manuel Balce Ceneta/AP)

In March, experts who advise the FDA questioned the efficacy of an experimental new drug for ALS. In September, they voted to approve it anyway.
(Image credit: Manuel Balce Ceneta/AP)