scientific article published on September 1, 1997

scientific article published on November 1997

scientific article published in March 2003

scientific article published in September 1997

scholarly article by Paola Piccini et al published February 1997 in Annals of Neurology

scientific article published in May 1994

scientific article

scientific article published in March 1996

scientific article published in July 1996

scientific article published in July 1998

scientific article