Parkinsonian Syndromes in Motor Neuron Disease: A Clinical Study oleh Jacopo Pasquini, Jacopo Pasquini, Jacopo Pasquini, Francesca Trogu, Francesca Trogu, Claudia Morelli, Barbara Poletti, Floriano Girotti, Silvia Peverelli, Alberto Brusati, Alberto Brusati, Antonia Ratti, Antonia Ratti, Andrea Ciammola, Vincenzo Silani, Vincenzo Silani, Nicola Ticozzi, Nicola Ticozzi