1. Division of Hematology and Oncology, Department of Medicine, University of Illinois at Chicago, Chicago, IL;
2. Department of Hematology, University College Hospital, Ibadan, Nigeria;
3. Division of Hematology and Oncology, Department of Pediatrics, University of Illinois at Chicago, Chicago, IL;
4. Pittsburgh Heart, Lung, Blood, and Vascular Medicine Institute and
5. Department of Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, PA;
6. Division of Pulmonary and Critical Care, Department of Medicine, University of Illinois at Chicago, Chicago, IL; and
7. Department of Public Health Sciences, Stritch School of Medicine, Loyola University Chicago, Maywood, IL