Letters to the editor.Published in:Muscle & Nerve, 1992, v. 15, n. 2, p. 255, doi. 10.1002/mus.880150219By:Oh, Shin J;Joy, Juan L;Sunwoo, Iinam;Kuruoglu, Reha;Sanders, Donald B.;Trontelj, Jože V.;Stålberg, Erik;Planer, G. J.;Pestronk, A.;Kaiser, K. K.;Brooke, M. H.Publication type:Article