1. Institute of Women's Health; University College London; London UK
2. Obstetrics and Gynaecology Department; Haemophilia centre and Thrombosis Unit; Royal Free Hospital NHS Foundation Trust; London UK
3. Haemostasis Research Unit; Department of Haematology; University College London; London UK
4. Institute of Epidemiology & Health; University College London; London UK
5. Angelo Bianchi Bonomi Hemophilia and Thrombosis; Centre Fondazione IRCCS Ca' Granda; Ospedale Maggiore Policlinico; Milan Italy
6. Angelo Bianchi Bonomi Hemophilia and Thrombosis Center; Università degli Studi di Milano; Milan Italy