[1] Sheffield Teaching Hosp NHS Fdn Trust, Pulm Vasc Dis Unit, Sheffield, S Yorkshire, England
[2] Liverpool Univ Hosp NHS Fdn Trust, Resp Med, Liverpool, Merseyside, England
[3] Univ Hosp Wales, Haematol, Cardiff, Wales
[4] Kings Coll Hosp London, Thrombosis & Coagulat, London, England
[5] Salford Royal NHS Fdn Trust, Emergency Med, Salford, Lancs, England
[6] St Thomas Hosp, Emergency Med, London, England
[7] Royal Free London NHS Fdn Trust, Barnet, England
[8] Southampton Gen Hosp, Resp Med, Southampton, Hants, England
[9] Papworth Hosp NHS Fdn Trust, Resp Med, Cambridge, England
[10] George Eliot Hosp NHS Trust, Resp Med, Nuneaton, England
[11] Chelsea & Westminster Hosp NHS Fdn Trust, Anticoagulat & Medicat Safety Clin Governance, London, England
[12] Kings Coll Hosp London, Resp Med, London, England
[13] Royal United Hosp Bath NHS Trust, Resp Med, Bath, Avon, England