1. Epidemiology Division, Department of Medicine, School of Medicine, University of California, Irvine, Irvine, California, USA
2. Department of Statistics, University of California, Irvine, Irvine, California, USA
3. Department of Civil and Environmental Engineering, School of Engineering, University of Southern California, Los Angeles, California, USA
4. AtmAA, Inc., Calabasas, California, USA
5. Department of Biomedical Engineering, University of California, Irvine, Irvine, California, USA
6. Department of Community and Environmental Medicine, School of Medicine, University of California, Irvine, Irvine, California, USA