The Chicago Tribune spoke to families and advocates seeking better treatment options for Duchenne muscular dystrophy as part of their coverage of Marathon Pharmaceuticals, a company working to earn U.S. approval for a Duchenne muscular dystrophy treatment. A Northbrook company said it has won fast-track status for approval of a drug that could become the first in the United States to treat Duchenne muscular dystrophy, a fatal muscle disease found most often in boys... U.S. Fo