Direct demonstration of the effects of repetitive transcranial magnetic stimulation on the excitability of the human motor cortex. - Lazzaro,V Di.; Oliviero,A.; Berardelli,A.; Mazzone,P.; Insola,A.; Pilato,F.; Saturno,E.; Dileone,M.; Tonali,P.A.; Rothwell,J.C. (Exp Brain Res, 2002)