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Submitted on: 22 May 1999.
Revised on: 01 July 1999.
Accepted on: 29 August 1999.
___________________Journal of Community Genetics---SPRINGER HEIDELBERG
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Submitted on: 17 March 2002.
Revised on: 28 May 2002.
Accepted on: 06 July 2002.
___________________Journal of Community Genetics---SPRINGER HEIDELBERG
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