1 Department of Clinical Biochemistry and Metabolic Medicine, Liverpool Clinical Laboratories, Royal Liverpool University Hospitals NHS Foundation Trust, Liverpool, United Kingdom.
2 Centre for Women's Health Research, Department of Women's and Children's Health, Institute of Life Course and Medical Sciences, University of Liverpool, Member of Liverpool Health Partners, Liverpool, United Kingdom.
3 Department of Diabetes and Endocrinology, Royal Liverpool University Hospitals NHS Foundation Trust, Liverpool, United Kingdom.