1. Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, University of New Mexico Health Sciences Center School of Medicine, 1 University of New Mexico, Albuquerque, New Mexico
2. Division of Occupational and Environmental Medicine, Department of Internal Medicine, University of California San Francisco School of Medicine, San Francisco, California
3. Department of Research and Evaluation, Global Alliance For Clean Cookstoves, Pennsylvania, Washington, District of Columbia
4. Dow University of Health Sciences, Ojha Campus, Karachi, Pakistan