claim: Parkinson's disease causes tremors.
evidence: Philip K. Bates -LRB- July 2 , 1902 -- December 21 , 1993 -RRB- was an American food scientist who was involved in the development of food freezing , dehydration , and concentration both in academia and in industry .. American. United States. food scientist. food science. food. food. freezing. freezing. dehydration. dehydration. concentration. concentration. academia. academia. industry. industry