1. State Key Joint Laboratory for Environmental Simulation and Pollution Control and State Environmental Protection Key Laboratory of Atmospheric Exposure and Health Risk Management, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, P. R. China
2. Department of Environmental Health Sciences, Jonathan and Karin Fielding School of Public Health, University of California Los Angeles, Los Angeles, California 90095, United States
3. Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California 90095, United States