Hemoglobin H-Constant Spring in North America: A Common Alpha Thalassemia with Frequent Complications.

Titi Singer, Hae-Young Kim, Nancy F Olivieri, Janet Kwiatkowski, Ashutosh Lal, Thomas D. Coates, Susan Carson, Melody J. Cunningham, Patricia J Giardina, Brigitta U Mueller, Charles Quinn, Elliott Vichinsky, Thalassemia Clinical Research Network