1 California Department of Public Health, Occupational Health Branch, Richmond, California, United States; [email protected].
2 California Department of Public Health, Occupational Health Branch, Richmond, California, United States.
3 University of California Los Angeles, Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Los Angeles, California, United States.
4 University of California San Francisco Department of Medicine, Division of Occupational, Environmental, and Climate Medicine, San Francisco, California, United States.