The Benchmarking Partnership, Alsager, Cheshire, UK

David Holland

School of Medicine, Keele University, Keele, ST5 5BG, Staffordshire, UK

Anthony A. Fryer, Christopher J. Duff & Pensee Wu

Res Consortium, Andover, SP10 5RG, UK

Mike Stedman

Centre for Health & Development, Staffordshire University, Stoke-on-Trent, ST4 2DF, Staffordshire, UK

Fahmy W. F. Hanna

Department of Diabetes and Endocrinology, University Hospitals of North Midlands NHS Trust, Stoke-on-Trent, ST4 6QG, Staffordshire, UK

Fahmy W. F. Hanna

Department of Clinical Biochemistry, North Midlands and Cheshire Pathology Services, University Hospitals of North Midlands NHS Trust, Stoke-on-Trent, ST4 6QG, Staffordshire, UK

Christopher J. Duff

Department of Clinical Biochemistry, St. Helens & Knowsley Teaching Hospitals NHS Trust, Whiston Hospital, Prescot, L35 5DR, UK

Lewis Green

Department of Clinical Biochemistry, The Royal Oldham Hospital, The Northern Care Alliance, Oldham, OL1 2JH, UK

Jonathan Scargill

Core Biochemical Assay Laboratory, Department of Clinical Biochemistry, Cambridge University Hospitals NHS Foundation Trust, Addenbrooke’s Hospital, Cambridge, CB2 0QQ, UK

Ian Halsall

Department of Pathology, Warrington & Halton Teaching Hospitals NHS Foundation Trust, Warrington, WA5 1QG, UK

Neil Gaskell

Department of Clinical Biochemistry, Salford Royal NHS Foundation Trust, Salford, M6 8HD, UK

Jonathon D. Howe

Department of Diabetes and Endocrinology, Salford Royal NHS Foundation Trust, Salford, M6 8HD, UK

Adrian H. Heald

The School of Medicine and Manchester Academic Health Sciences Centre, The University of Manchester, Manchester, M13 9PL, UK

Adrian H. Heald

Department of Obstetrics & Gynaecology, University Hospitals of North Midlands NHS Trust, Stoke-on-Trent, ST4 6QG, Staffordshire, UK

Pensee Wu