Changing trends and challenges in the management of asthma in Asia Woo-Jung Song, MD, PhD, Gary W.K. Wong, MD  Journal of Allergy and Clinical Immunology  Volume 140, Issue 5, Pages 1272-1274 (November 2017) DOI: 10.1016/j.jaci.2017.09.008 Copyright © 2017 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 1 A, Historical trends in the ratio of rural per total population in different continents: Adapted from “World urbanization prospects: the 2014 revision” by the Department of Economic and Social Affairs, Population Division, © (2014) United Nations. Reprinted with the permission of the United Nations. Custom data were acquired from the following Web site: https://esa.un.org/unpd/wup/DataQuery/. B, Mean population exposure to PM2.5 in Asian and Western countries. Results are based on data from the Organisation for Economic Co-operation and Development (1998-2015), “Exposure to PM2.5 in countries and regions,” http://stats.oecd.org (accessed September 11, 2017). Journal of Allergy and Clinical Immunology 2017 140, 1272-1274DOI: (10.1016/j.jaci.2017.09.008) Copyright © 2017 American Academy of Allergy, Asthma & Immunology Terms and Conditions

Fig 2 Increasing burden of asthma and related environmental risk factors in Asia. Journal of Allergy and Clinical Immunology 2017 140, 1272-1274DOI: (10.1016/j.jaci.2017.09.008) Copyright © 2017 American Academy of Allergy, Asthma & Immunology Terms and Conditions