Institution: | 1. Stig-Erik Jakobsen, Bergen University College, P.O. Box 7030, NO-5020 Bergen, Norway. E-mail: Stig-Erik.Jakobsen@hib.no;2. Torbj?rn Lorentzen, Uni Research, University of Bergen, Allegaten 70, NO-5007 Bergen, Norway. E-mail: torbjorn.lorentzen@uni.no |