[1] Harvard Med Sch, Massachusetts Gen Hosp, Div Hematol, Boston, MA 02115 USA
[2] CHU Henri Mondor, Unite Malad Genet Globule Rouge, Creteil, France
[3] Rigshosp, Dept Hematol, Copenhagen, Denmark
[4] Duke Univ, Med Ctr, Durham, NC USA
[5] Univ Wurzburg, Dept Paediat, Wurzburg, Germany
[6] Dana Farber Boston Childrens Canc & Blood Disorde, Boston, MA USA
[7] Hosp Univ La Paz, Hematol Dept, Madrid, Spain
[8] Hammersmith Hosp, Imperial Coll Healthcare NHS Trust, London, England
[9] Tohoku Univ Hosp, Sendai, Miyagi, Japan
[10] McMaster Univ, Hamilton, ON, Canada
[11] Fdn IRCCS CaGranda Osped Maggiore Policlin, Milan, Italy
[12] Agios Pharmaceut Inc, Cambridge, MA USA
[13] Univ Utrecht, Univ Med Ctr Utrecht, Dept Internal Med, Van Creveldklin, Utrecht, Netherlands