1. Nicholas School of the Environment, Duke University, Durham, North Carolina 27708, United States
2. Global Health Institute, Duke University, Durham, North Carolina 27708, United States
3. Department of Pediatrics, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai 200240, China
4. Global Health Research Center, Duke Kunshan University, Kunshan, Jiangsu Province 215316, China
5. Department of Civil and Environmental Engineering, Duke University, Durham, North Carolina 27708, United States
6. Department of Building Science, Tsinghua University, Beijing 100084, China
7. Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing 100084, China
8. Department of Pulmonary Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, China
9. Department of Civil and Environmental Engineering, College of Engineering, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
10. Underwriters Laboratories, Inc, Marietta, Georgia 30067, United States