1 Italian Federation of Haemophilia Societies (FedEmo), Rome, Italy.
2 Italian Federation of Haemophilia Societies Medical Council, Rome, Italy Thrombosis and Haemostasis Unit, Giannina Gaslini Children's Hospital, Genoa, Italy.
3 Italian National Blood Centre, National Institute of Health, Rome, Italy.
4 Italian Federation of Haemophilia Societies Medical Council, Rome, Italy Department of Biomedical Sciences and Human Oncology, Paediatric Unit, University of Bari, Bari, Italy.
5 Department of Internal Medicine, University of Perugia, Perugia, Italy.
6 Italian Federation of Haemophilia Societies Medical Council, Rome, Italy Department of Clinical Medicine and Surgery Federico II University of Naples, Naples, Italy.
7 Italian Federation of Haemophilia Societies Medical Council, Rome, Italy Department of Medicine and Ageing Sciences, University of Chieti, Chieti, Italy.
8 Italian Federation of Haemophilia Societies Medical Council, Rome, Italy Oxford Haemophilia and Thrombosis Centre, Oxford, United Kingdom.