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Submitted on: 20 May 2009.
Revised on: 21 August 2009.
Accepted on: 15 October 2009.
___________________Eye & Contact Lens-Science and Clinical Practice
Submitted on: 28 February 1998.
Revised on: 27 June 1998.
Accepted on: 08 August 1998.
___________________Eye & Contact Lens-Science and Clinical Practice
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