1. Department of Clinical Medicine and Surgery Federico II University Naples Italy
2. Department of Health Science ‐ DISSAL University of Genoa and IRCCS Ospedale Policlinico San Martino Genoa Italy
3. IRCCS Fondazione Policlinico San Matteo Pavia Italy
4. La Paz University Hospital Madrid Spain
5. Pfizer, Inc. Jeddah Saudi Arabia
6. Kent Haemophilia & Thrombosis Centre, Canterbury United Kingdom and Royal London Hospital London UK
7. Van Creveldkliniek, UMC Utrecht Utrecht The Netherlands
8. Pfizer Ltd Walton Oaks Surrey UK