[1] Univ Alabama Birmingham, Hematol Oncol, Birmingham, AL 35294 USA
[2] Virginia Commonwealth Univ, Div Gen Internal Med, Richmond, VA USA
[3] Ohio State Univ, Div Hematol, Wexner Med Ctr, Columbus, OH 43210 USA
[4] Univ Calif San Francisco, Benioff Childrens Hosp, Oakland, CA USA
[5] Univ Connecticut Hlth, Neag Comprehens Canc Ctr, New England Sickle Cell Inst, Farmington, CT USA
[6] Univ N Carolina, Comprehens Sickle Cell Dis Program, Chapel Hill, NC 27515 USA
[7] Ctr Inherited Blood Disorders, Orange, CA USA
[8] Childrens Hosp Orange Cty, Orange, CA 92668 USA
[9] Martin Luther King Jr MLK Outpatient Ctr, Los Angeles, CA USA
[10] Albert Einstein Coll Med, Dept Pediat, Bronx, NY 10467 USA
[11] Duke Univ, Div Hematol, Durham, NC USA
[12] Duke Univ, Div Pediat Hematol Oncol, Durham, NC USA
[13] Atrium Hlth, Levine Canc Inst, Sickle Cell Dis Enterprise, Charlotte, NC USA
[14] Johns Hopkins Univ, Gen Internal Med, Baltimore, MD USA
[15] Washington Univ, Sch Med, Pediat Hematol & Oncol, St Louis, MO USA
[16] Cincinnati Childrens Hosp Med Ctr, Dept Pediat, Div Hematol, Cincinnati, OH 45229 USA
[17] Univ Cincinnati, Coll Med, Dept Pediat, Cincinnati, OH USA
[18] Yale New Haven Hlth, Dept Internal Med, New Haven, CT USA
[19] Johns Hopkins Univ, Sch Med, Dept Med, Baltimore, MD 21205 USA