US Food and Drug Administration Commissioner Marty Makary said he’s “taking a hard look” at whether a gene therapy from Sarepta Therapeutics Inc. should remain on the market.Makary made the comments in an interview with Bloomberg News.

The company refused the FDA’s request and will continue shipping its therapy, Elevidys, to Duchenne patients who can still walk. A pause on shipments to older, non-ambulatory patients remains in place.

Sarepta Therapeutics is pausing shipments of its gene therapy for muscular dystrophy following several patient deaths that have attracted attention from regulators