The reference requested is PARKINSONS DISEASE, A Guide for Patient and Family, by Roger C. Duvoisin, MD, pub. by RAven Press. 1140 Ave. of the Americas, NYC 10036. We have the 2nd edition, but I believe there is a newer one out now. The med to "delay the progression" may be Eldepryl as it is hoped that will be the result of taking it early. You can get lots of good info from the Nat'l Parkinsons Foundation in Miami--their National number is : 1-800-327-4545. Good luck! Camilla Flintermann, Oxford,OH