http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12436085&dopt=Abstract
J Clin Neurophysiol 2002 Aug;19(4):272-93
Cantello R.
Department of Medical Sciences, Section of Neurology, School of Medicine, Amedeo Avogadro University, Novara, Italy.