i would think scientists would need to learn about the disease process that causes cells to die in the first place. Has anybody dealt with this aspect of the problem? Dr. Levesque's patient Dennis Miller had his PD return after a few years reprieve from symptoms due to implantation of his own cultivated and multiplied brain cells. It would seem that only in spinal cord and other injuries would actual replacement of cells work. Ray ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn