The elder Dion explained that while the singer (and her family) hope to see her back onstage, the progression of her illness has left them uncertain. “It’s true that, in both our dreams and hers, the goal is to return to the stage. In what capacity? I don’t know,” Dion continued. “The vocal cords are muscles, and the heart is also a muscle. This is what comes to get me. Because [Dion’s condition is a] one out of a million case, the scientists haven’t done that much research because it didn’t affect that many people.” Representatives for Celine Dion...