[1] Univ Oxford, NIHR Sch Primary Care Res, Dept Primary Hlth Care, Oxford, England
[2] Univ Birmingham, Dept Med, Birmingham, W Midlands, England
[3] Birmingham Heartlands Hosp, Heart England Natl Hlth Serv Fdn Trust, Birmingham B9 5ST, W Midlands, England
[4] Charles R Drew Univ Med & Sci, Clin Ctr Res Excellence, Los Angeles, CA 90059 USA
[5] CHU, Hosp Jeanne dArc, CIC Inserm, F-54201 Toul, France
[6] Univ Nancy, F-54201 Toul, France
[7] Western Hlth & Social Care Trust, Altnagelvin Hosp, Dept Clin Chem, Londonderry, Ireland
[8] Diabet Zentrum Hamburg City, D-20095 Hamburg, Germany