http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12350028&dopt=Abstract
Chang Gung Med J 2002 Jul;25(7):424-36
Lin KL, Pascual-Leone A.
Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA.