1. Division of Biostatistics & Epidemiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
2. Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA
3. Eudowood Division of Pediatric Respiratory Sciences, Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
4. Division of Biomedical Informatics, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
5. Department of Biostatistics, Erasmus Medical Center, Rotterdam, The Netherlands
6. Department of Medical Statistics, London School of Hygiene and Tropical Medicine, London, UK
7. Department of Mathematical Sciences, University of Cincinnati, Cincinnati, OH, USA
8. Department of Clinical Research, Cystic Fibrosis Foundation, Bethesda, MD, USA