Emily Riehm Meier, MD, MSHSPediatric Hematologist and Director, Sickle Cell Research, Indiana Hemophilia and Thrombosis Center, Indianapolis, IN, USAAllistair Abraham, MDChildren’s National Medical Center, Division of Blood and Marrow Transplantation, Washington, DC, USARoss M. Fasano, MDEmory University School of Medicine, Department of Pathology & Laboratory Medicine, Atlanta GA, USA