1. Division of Biostatistics & EpidemiologyCincinnati Children's Hospital Medical Center and Department of Pediatrics, University of Cincinnati Cincinnati Ohio
2. Department of Mathematical SciencesUniversity of Cincinnati Cincinnati Ohio
3. Department of Medical StatisticsLondon School of Hygiene and Tropical Medicine London UK
4. Division of Biomedical InformaticsCincinnati Children's Hospital Medical Center, and Department of Pediatrics, University of Cincinnati Cincinnati Ohio
5. James M. Anderson Center for Health Systems Excellence and Department of PediatricsUniversity of Cincinnati Cincinnati Ohio
6. CHICASLancaster Medical School Lancaster University Lancaster, UK and Health Data Research UK London UK
7. Division of Pulmonary MedicineCincinnati Children's Hospital Medical Center and Department of Pediatrics, University of Cincinnati Cincinnati Ohio
8. Cystic Fibrosis Foundation Bethesda Maryland