An Extension Study to Evaluate Casimersen or Golodirsen in Patients With Duchenne Muscular Dystrophy

The main objective of this study is to evaluate the safety and tolerability of long-term treatment with casimersen or golodirsen in patients with Duchenne muscular dystrophy (DMD).

Inclusion Criteria:

* Completed a clinical trial evaluating casimersen or golodirsen, per protocol.
* Is between 7 and 23 years of age, inclusive, at enrollment.

Other inclusion/exclusion criteria apply.