1. Global Initiative for Chronic Obstructive Lung Disease (GOLD) Global strategy for the diagnosis, management and prevention of chronic obstructive pulmonary disease http://www.goldcopd.org/
2. World Health Report World Health Organization Geneva http://www.who.int/respiratory/copd/burden/en/index.html
3. Chinese Ministry of Health The top-ten disease-specific rates and causes of death among urban and rural residents http://www.moh.gov.cn/publicfiles/business/htmlfiles/zwgkzt/ptjnj/200908/42635.htm
4. Genetics of copd and emphysema;Wan;Chest,2009
5. Lung function and airway diseases;Weiss;Nat. Genet.,2010