[1] Barts & London Queen Marys Sch Med & Dent, Dept Haematol, London E1 2ES, England
[2] NHS Trust, St Georges Healthcare, Dept Haematol, London, England
[3] Univ Toronto, Hosp Sick Children, Div Haematol Oncol, Toronto, ON M5G 1X8, Canada
[4] Manchester Royal Infirm, Dept Clin Haematol, Manchester M13 9WL, Lancs, England
[5] New York Hosp, Dept Pediat, New York, NY 10021 USA
[6] Univ New S Wales, St George Clin Sch, Sydney, NSW, Australia
[7] Hosp Univ Penn, Dept Pathol & Lab, Philadelphia, PA 19104 USA
[8] Puget Sound Blood Ctr, Seattle, WA 98104 USA
[9] Univ Washington, Seattle, WA 98195 USA
[10] Assistance Publ Hop Paris, Serv Med Interne, Paris, France
[11] Royal Manchester Childrens Hosp, Manchester M27 1HA, Lancs, England
[12] Univ York, Hull York Med Sch, York YO10 5DD, N Yorkshire, England
[13] Kings Coll London, London WC2R 2LS, England
[14] Guys & St Thomas Natl Hlth Serv NHS Fdn Trust, Dept Haematol, London, England
[15] Guys & St Thomas Natl Hlth Serv NHS Fdn Trust, Dept Pathol, London, England
[16] Guys & St Thomas Natl Hlth Serv NHS Fdn Trust, Dept Rheumatol, London, England
[17] Univ Childrens Hosp, Basel, Switzerland
[18] St James Univ Hosp, Leeds LS9 7TF, W Yorkshire, England
[19] Scripps Res Inst, La Jolla, CA 92037 USA
[20] San Bortolo Hosp, Dept Cell Therapy & Hematol, Vicenza, Italy
[21] Hosp Univ La Fe, Dept Haematol, Valencia, Spain
[22] Comprehens Bleeding Disorders Ctr, Peoria, IL USA
[23] ITP Support Assoc, Bedford, England
[24] Platelet Disorder Support Assoc, Rockville, MD USA
[25] Massachusetts Gen Hosp, Dept Hematol, Boston, MA 02114 USA
[26] Harvard Univ, Sch Med, Boston, MA USA