1. Department of Haematology; Glasgow Royal Infirmary; Glasgow; UK
2. Department of Haematology; Addenbrooke's Hospital; Cambridge; UK
3. Department of Haematology; Aberdeen Royal Infirmary; Aberdeen; UK
4. Department of Haematology; Imperial College at Hammersmith Hospital; London; UK
5. Department of Cardiovascular Science; Royal Hallamshire Hospital; Sheffield; UK
6. Oxford Haemophilia and Thrombosis Centre; Churchill Hospital; Oxford; UK