1. Global Initiative for Asthma. Global Strategy for Asthma and Prevention. 2018. https://ginasthma.org/wp-content/uploads/2018/04/wms-GINA-2018-report-V1.3-002.pdf
2. Global Initiative for Chronic Obstructive Lung Disease. Global Strategy for the Diagnosis, Management and Prevention of Chronic Obstructive Pulmonary Disease. 2018. https://goldcopd.org/wp-content/uploads/2017/11/GOLD-2018-v6.0-FINAL-revised-20-Nov_WMS.pdf
3. The asthma–COPD overlap syndrome: towards a revised taxonomy of chronic airways diseases?;Lancet Respir Med,2015
4. Chronic obstructive pulmonary disease subpopulations and phenotyping;J Allergy Clin Immunol,2018
5. Clinical significance of symptoms in smokers with preserved pulmonary function;N Engl J Med,2016