1 Hormone Laboratory, Department of Medical Biochemistry and Pharmacology, Laboratory Medicine and Pathology, 60498 Haukeland University Hospital , Bergen, Norway.
2 Department of Clinical Science, University of Bergen, Bergen, Norway.
3 Department of Clinical Chemistry, NSW Health Pathology, Liverpool Hospital, Liverpool, NSW, Australia.
4 Department of Clinical Chemistry, and Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.
5 Department of Chemical Pathology, SydPath, St. Vincent's Hospital, Darlinghurst, NSW, Australia.
6 Faculty of Medicine, University of New South Wales, Kensington, NSW, Australia.
7 Department of Heart Disease, 60498 Haukeland University Hospital , Bergen, Norway.