1. Coagulation Laboratory Royal Hallamshire Hospital Sheffield UK
2. Institut für Experimentelle Hämatologie und Transfusionsmedizin Universitätsklinikum Bonn Bonn Germany
3. Diagnostic Haemostasis & Thrombosis, Viapath Analytics Guy's & St. Thomas' Hospitals London UK
4. Department of Pathology University of New Mexico Health Sciences Center Albuquerque NM USA