Liposome-delivered superoxide dismutase prevents nitric oxide-dependent motor neuron death induced by trophic factor withdrawal. - Estevez,A.G.; Sampson,J.B.; Zhuang,Y.X.; Spear,N.; Richardson,G.J.; Crow,J.P.; Tarpey,M.M.; Barbeito,L.; Beckman,J.S. (Free Radical Biol Med, 2000)