1. Role of metformin in treatment of patients with chronic obstructive pulmonary disease: a systematic review;Zhu;J Thorac Dis,2019
2. The association between COPD and heart failure risk: a review;de Miguel;Int J Chron Obstruct Pulmon Dis,2013
3. Prevalence of comorbidities in patients with obstructive sleep apnea syndrome, overlap syndrome and obesity hypoventilation syndrome;Lacedonia;Clin Respir J,2018
4. Obesity hypoventilation syndrome;Masa;Eur Respir Rev,2019
5. McConville JF, Solway J, Mokhlesi B. Disorders of Ventilation. In: Jameson JL, Fauci AS, Kasper DL, Hauser SL, Longo DL, Loscalzo J, editors. Harrison’s Principles of Internal Medicine, 20e [Internet]. New York, NY: McGraw-Hill Education; 2018 [cited 2019 Dec 22]. Available from: http://accessmedicine.mhmedical.com/content.aspx?aid=1155976546.