Submitted on: 26 March 1999.
Revised on: 27 April 1999.
Accepted on: 26 May 1999.
___________________DIAGNOSTICA---HOGREFE VERLAG
Submitted on: 11 June 2023.
Revised on: 20 July 2023.
Accepted on: 09 August 2023.
___________________DIAGNOSTICA---HOGREFE VERLAG
Submitted on: 19 March 2012.
Revised on: 01 June 2012.
Accepted on: 14 June 2012.
___________________DIAGNOSTICA---HOGREFE VERLAG
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Submitted on: 06 January 2003.
Revised on: 28 March 2003.
Accepted on: 07 May 2003.
___________________DIAGNOSTICA---HOGREFE VERLAG
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