1. Departments of Clinical Biochemistry (C.C., M.L.S.L., E.D.B., J.P.G., L.B.N.), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark 2100
2. Department of Clinical Physiology (E.B.), Sahlgrenska University Hospital, SE-413 45 Göteborg, Sweden
3. Pathology (C.B.A.), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark 2100