1. Department of Chemical Pathology, LabPlus, Auckland City Hospital, Auckland City Hospital, Auckland, New Zealand.
2. Department of Endocrinology, Auckland City Hospital, Auckland City Hospital, Auckland, New Zealand.
3. Medical Programme Directorate, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
4. Department of Clinical Biochemistry, Southern Community Laboratories Dunedin Hospital, Dunedin, New Zealand.
5. Auckland Science Analytical Services, University of Auckland, Auckland, New Zealand.
6. School of Biological Sciences, University of Auckland, Auckland, New Zealand.
7. Department of Physiology, School of Medical Sciences, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
8. Department of Biochemistry, LabTests, Auckland, New Zealand.