Ivan, in a message dated 98-11-29 16:50:55 EST, you write: << <the formula is age now/age at diagnosis/age when first symptoms appeared.>>> oops! Here's my sign-up info now including"the formula's" age when I first went to see a doctor for symptoms that were later referred to by my 'Neuro' as 'probably related to PD': 13 Maryhelen Davila 46/36/20 Phoenix, Arizona USA pwp [log in to unmask] >>> Thanks mhd