FILE--Dr. Paolo Zamboni looks on before speaking about the breakthrough medical research he has done at the Neurologist Seminar in Toronto on Wednesday, April 14, 2010.An Italian doctor pioneering an unproven treatment for multiple sclerosis says it's "not responsible" to deny Canadian patients access to the procedure.Dr. Paolo Zamboni told MPs the controversial procedure has so far shown promising results. THE CANADIAN PRESS/Nathan Denette