Edit Hogne Stokke Lilleaas Affiliation Department of Clinical Science E-mail hogne.lilleaas@student.uib.no Visitor address Haukeland universitetssykehus, Laboratoriebygget5009 Bergen Postal address P.O. Box 7804 NO-5020 Bergen Norway Hogne Stokke Lilleaas Affiliation Department of Clinical Science