1. Global Initiative for Chronic Obstructive Lung Disease . Global, Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Pulmonary Disease Report (2019 report). https://goldcopd.org/wp-content/uploads/2018/11/GOLD-2019-v1.7-FINAL-14Nov2018-WMS.pdf Date last accessed: March 17, 2019.
2. National Institute for Health and Care Excellence . Chronic obstructive pulmonary disease in over 16s: diagnosis and management. www.nice.org.uk/guidance/ng115/resources/chronic-obstructive-pulmonary-disease-in-over-16s-diagnosis-and-management-pdf-66141600098245 Date last accessed: March 17, 2019. Date last updated: December 05, 2018.
3. National Institute for Health and Care Excellence . Chronic obstructive pulmonary disease overview. https://pathways.nice.org.uk/pathways/chronic-obstructive-pulmonary-disease Date last accessed: March 17, 2019.
4. Depression and anxiety in chronic heart failure and chronic obstructive pulmonary disease: prevalence, relevance, clinical implication and management principles;Yohannes;Int J Geriatr Psychiatry,2010
5. The efficacy of psychologically based interventions to improve anxiety, depression and quality of life in COPD: A systematic review and meta-analysis