Minn. boy receives groundbreaking muscular dystrophy treatment / Advanced imaging and theoretical physics unlock clues to new treatments for muscular dystrophy / 'It's cruel that I cannot get muscular dystrophy drug' / Woman with muscular dystrophy completes 12 half-marathons in wheelchair for charity: 'Won't let it define me' / Nine-year-old with muscular dystrophy to model on runway at Bristol Fashion Show