Source: Fetal tissue implant – Wikipedia
…In 1982, seven people in Santa Clara County, California were diagnosed with Parkinsonism after having used MPPP contaminated with MPTP. In 1992, two of the seven patients were successfully treated at Lund University Hospital in Sweden with neural grafts of fetal tissue. One patient, who had been essentially paralyzed, regained enough motor function to ride a bicycle.[1]