International consensus report on the investigation and management of primary immune thrombocytopenia

South West London and St George's Mental Health NHS Trust, National Health Service, Hospital for Sick Children, University of Toronto, Manchester Royal Infirmary, St George Hospital, UNSW Sydney, Hospital of the University of Pennsylvania, Bloodworks Northwest, University of Washington, Assistance Publique – Hôpitaux de Paris, Royal Manchester Children's Hospital, University of York, Hull York Medical School, Guy's and St Thomas' NHS Foundation Trust, King's College London, University Children’s Hospital Basel, St James's University Hospital, Scripps Research Institute, Ospedale San Bortolo, Hospital Universitari i Politècnic La Fe, Bleeding & Clotting Disorders Institute, Massachusetts General Hospital, Harvard University