_:vb50956824 "A myopathy is characterized by progressive skeletal muscle weakness degeneration."^^ . _:vb50956824 . _:vb50956824 . _:vb50956824 "url:http://www.ninds.nih.gov/disorders/md/md.htm"^^ . _:vb50956824 . _:vb50956824 "url:http://en.wikipedia.org/wiki/Muscular_dystrophy"^^ . _:vb50956824 . _:vb50956824 .