Cherie, what I meant is that I know some of the the info. I could find a good source for you. My best source to begin on all topics of MS is The Multiple Sclerosis Handbook edited by Stuart D. Cook, Fourth Edition, 2006, pub. Taylor and Francis. I bought it on Amazon (about $150). Parts of it are too technical for me and parts would be readable by anybody. He delves into the raw science that is making up our knowledge - each chapter having 100's of references of studies and articles. It's a tough read, but very worthwhile. Q