A controversial treatment for multiple sclerosis will come under international scrutiny at a conference in Italy this week. Among the research to be discussed is a paper by a doctor who was intrigued by the treatment and decided to test it on his son. Neurologist Dr. David Hubbard was drawn into the controversial Zamboni treatment after his son Devin, 27, developed MS."I wasn't going to sit on my hands and watch him end up in a wheelchair," Hubbard says.