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Submitted on: 14 January 2003.
Revised on: 21 February 2003.
Accepted on: 08 April 2003.
___________________Journal of Parkinsons Disease---IOS PRESS
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Submitted on: 05 June 2002.
Revised on: 23 September 2002.
Accepted on: 17 November 2002.
___________________Journal of Parkinsons Disease---IOS PRESS
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