1. Research Haematology University College London London UK
2. Division of Angiology and Hemostasis, Faculty of Medicine of Geneva University Hospitals Geneva Switzerland
3. Centre of Excellence for Nutrition North‐West University Potchefstroom South Africa
4. South African Medical Research Council Extramural Unit for Hypertension and Cardiovascular Disease North‐West University Potchefstroom South Africa
5. Mayo Clinic Rochester New York USA
6. UK NEQAS Sheffield UK
7. Department of Medical Technique Nagoya University Hospital Nagoya Japan