1 Sickle Cell Center; Department of Medicine; University of Illinois at Chicago, Chicago IL 60612.
2 Sickle Cell Center; Department of Medicine; University of Illinois at Chicago, Chicago IL 60612; Department of Pharmacy Practice, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612.
3 Department of Internal Medicine, Virginia Commonwealth University Medical Center, Richmond, VA, 23219.
4 Sickle Cell Center; Department of Medicine; University of Illinois at Chicago, Chicago IL 60612; Department of Medicine; Jesse Brown VA Medical Center, Chicago IL 60612.
5 Sickle Cell Center; Department of Medicine; University of Illinois at Chicago, Chicago IL 60612. ssaraf@uic.edu.