gene mutations in steroid-responsive limb girdle muscular dystrophy by Godfrey, C, Escolar, D, Brockington, M, Clement, E, Mein, R, Jimenez-Mallebrera, C, Torelli, S, Feng, L, Brown, S, Sewry, C, Rutherford, M, Shapira, Y, Abbs, S, Muntoni, F