Serological and experimental studies in different forms of myasthenia gravis by Vincent, A, Huda, S, Cao, M, Cetin, H, Koneczny, I, Rodriguez Cruz, PM, Jacobson, L, Viegas, S, Jacob, S, Woodhall, M, Nagaishi, A, Maniaol, A, Damato, V, Leite, MI, Cossins, J, Webster, R, Palace, J, Beeson, D