1. Vogelmeier CF, Criner GJ, Martinez FJ, Anzueto A, Barnes PJ, Bourbeau J, et al. Global Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Lung Disease 2017 Report: GOLD Executive Summary. Eur Respir J. 2017;49(3):1700214. doi: 10.1183/13993003.00214-2017.
2. ACIP. Prevention of Pneumococcal Disease – Recommendations of the Advisory Committee on Immunization Practices (ACIP). Morbidity and Mortality Weekly Report [recommendations and reports series], 1997, 46:RR-8. https://www.cdc.gov/mmwr/pdf/rr/rr4608.pdf.
3. Fang LW, Gao P, Bao HL, Tang X, Wang BH, Feng YJ, et al. Chronic obstructive pulmonary disease in China: a nationwide prevalence study. Lancet Respir Med 2018;6(6):421 − 30. http://dx.doi.org/10.1016/S2213-2600(18)30103-6.
4. Expert Group on Diagnosis and Treatment of Acute Exacerbation of Chronic Obstructive Pulmonary Disease. Chinese expert consensus on diagnosis and treatment of acute exacerbation of chronic obstructive pulmonary disease (AECOPD)(2017 update). Int Respir J 2017;37(14):1041 − 57. http://dx.doi.org/10.3760/cma.j.issn.1673-436X.2017.14.001. (In Chinese).
5. World Health Organization. Training manual for Enzyme linked immunosorbent assay for the quantitation of Streptococcus pneumoniae serotype specific IgG (Pn PS ELISA) (007sp Version). https://www.vaccine.uab.edu/uploads/mdocs/ELISAProtocol(007sp).pdf. [2021-2-25].