1. ECAT Foundation, Dobbeweg 1, Voorschoten, The Netherlands
2. NEQAS UK Coagulation, Sheffield, United Kingdom
3. RCPAQAP Haematology, St Leonards, New South Wales, Australia
4. Institute of Haematology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia
5. Department of Pathology and Laboratory Medicine, Laboratory of Clinical Chemistry and Hematology, Academic Hospital of Parma, Parma, Italy
6. Department of Haematology, Institute of Clinical Pathology and Medical Research (ICPMR), Pathology West, Westmead Hospital, Westmead, New South Wales, Australia