1. Division of Pulmonary Medicine, Allergy and Immunology, Department of Pediatrics, Children’s Hospital of Pittsburgh, University of Pittsburgh Medical Center, University of Pittsburgh, Pennsylvania 15224
2. Departments of Human Genetics and Biostatistics, Graduate School of Public Health, University of Pittsburgh, Pennsylvania 15261
3. Department of Biostatistics, University of Alabama at Birmingham, Alabama 35294
4. Departments of Molecular Physiology and Biophysics and Neurology, Vanderbilt University Medical Center, Nashville, Tennessee 37232
5. Analytics of Metrics Central, Global QARAC Headquarters, ConvaTec, Inc., Greensboro, North Carolina 27409
6. Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
7. Department of Biostatistics and Bioinformatics, Tulane University, New Orleans, Louisiana 70112
8. Department of Public Health Sciences, University of Chicago, Illinois 60637