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Authors
Hoppe, Ulf-Peter
Eriksen, Torkild
Thrane, Eivind V.
Blix, Tom A.
Fiedler, Jens
Lübken, Franz-Josef
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Article History
Received: 17 August 1998
Revised: 24 May 1999
Accepted: 24 May 1999
First Online: 26 June 2014
Free to read: This content has been made available to all.
