1. Global Initiative for Chronic Obstructive Lung Disease. Global strategy for the diagnosis, management, and prevention of chronic obstructive pulmonary disease; 2020. Available from: https://goldcopd.org. Accessed August 28, 2020.
2. World Health Organization. Available from: https://www.who.int/gho/mortality_burden_disease/causes_death/top_10/en/. Accessed August 28, 2020.
3. World health organization. Chronic obstructive pulmonary disease (COPD). Available from: https://www.who.int/news-room/fact-sheets/detail/chronic-obstructive-pulmonary-disease-(copd). Accessed August 30, 2020.
4. Japanese Respiratory Society. The JRS Guidelines for the Management of Chronic Obstructive Pulmonary Disease. 5th ed. Tokyo: Medical Review Co., Ltd; 2018.
5. Risk of cardiovascular comorbidity in patients with chronic obstructive pulmonary disease: a systematic review and meta-analysis