1. Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, USA
2. Division of Biostatistics and Epidemiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
3. Division of Asthma Research, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
4. Department of Internal Medicine, University of Cincinnati, College of Medicine, Cincinnati, OH, USA
5. Bernstein Clinical Research Center, Cincinnati, OH, USA