1. Park SY, Kwon HS, Kim H, Yang HY, Cho YS. Prevalence and incidence of asthma in South Korea based on the Korea National Health and Nutrition Examination Survey. OLD. 2016; 4:23–32.
2. Korean Statistical Information Service. Cause of death (236 items): number of death according to sex and age [Internet]. Daejeon: Statistics Korea;2017. [cited 2018 Jan 10]. Available from:. http://kosis.kr./statHtml/statHtml.do?orgId=101&tblId=DT_1B34E07&vw_cd=MT_ZTITLE&list_id=D11&seqNo=&lang_mode=ko&language=kor&obj_var_id=&itm_id=&conn_path=MT_ZTITLE.
3. Enright PL, McClelland RL, Newman AB, Gottlieb DJ, Lebowitz MD. Underdiagnosis and undertreatment of asthma in the elderly: Cardiovascular Health Study Research Group. Chest. 1999; 116:603–613.
4. Global Initiative for Asthma. Global strategy for asthma management and prevention [Internet]. Bethesda: Global Initiative for Asthma;2018. [cited 2018 Jan 10]. Available from:. http://ginasthma.org/2018-gina-report-global-strategy-for-asthma-management-and-prevention/.
5. Cassino C, Berger KI, Goldring RM, Norman RG, Kammer-man S, Ciotoli C, Reibman J. Duration of asthma and physiologic outcomes in elderly nonsmokers. Am J Respir Crit Care Med. 2000; 162:1423–1428.
Article
6. Burrows B, Barbee RA, Cline MG, Knudson RJ, Lebowitz MD. Characteristics of asthma among elderly adults in a sample of the general population. Chest. 1991; 100:935–942.
Article
7. Dunn RM, Busse PJ, Wechsler ME. Asthma in the elderly and late-onset adult asthma. Allergy. 2018; 73:284–294.
Article
8. Global Initiative for Chronic Obstructive Lung Disease. Global strategy for the diagnosis, management and prevention of COPD [Internet]. Bethesda: Global Initiative for Chronic Obstructive Lung Disease;2017. [cited 2018 Jan 10]. Available from:. http://goldcopd.org/gold-2017-global-strategy-diagnosis-management-prevention-copd/.
9. Centers for Disease Control and Prevention. Pneumoncoccal vaccine publications [Internet]. Atlanta: Centers for Disease Control and Prevention;2018. [cited 2018 Jan 10]. Available from:. https://www.vaccines.gov/diseases/pneumonia/index.html.