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When it comes to Duchenne muscular dystrophy (Âé¶¹Éç), Leonardo Feder knows he’s among the lucky ones. A resident of São Paulo, Brazil’s largest city, Feder was diagnosed with Duchenne at age 6 and immediately began taking corticosteroids as well as heart medicine and supplements. Leonardo Feder,…

The U.S. Food and Drug Administration(FDA) is updating its 2015 draft guidelines for drug discovery in rare diseases, with new guidance on natural history— how disorders such as spinal muscle atrophy(SMA) run their course if untreated — the choice of “efficacy endpoints” in clinical trials, and how…