1. Department of Pediatrics; Division of Hematology/Oncology; Vanderbilt-Meharry Center for Excellence in Sickle Cell Disease; Vanderbilt University Medical Center; Nashville TN USA
2. Rodeghier Consultants; Chicago IL USA
3. Department of Pediatrics; Division of Allergy, Immunology, and Pulmonary Medicine; Washington University School of Medicine; St Louis MO USA
4. Department of Pediatrics; Division of Pediatric Pulmonary, Allergy/Immunology and Sleep; University Hospitals-Cleveland Medical Center; Rainbow Babies and Children's Hospitals; Cleveland OH USA
5. Developmental Neurosciences Unit; UCL Great Ormond Street Institute of Child Health; London United Kingdom
6. Department of Pediatrics; Division of Pediatric Pulmonary & Allergy; Boston University School of Medicine; Boston MA USA