Bhowmik, Kalyan, Moniruzzaman ., Anjan Adhikari, Shahnaz Choudhury, and MSA Mansur Ahmed. 2013. “Prevalence of Depression and Its Risk Factors Among Patients With Chronic Obstructive Pulmonary Disease in a Tertiary Level Hospital in West Bengal, India”. South East Asia Journal of Public Health 2 (2):34-40. https://doi.org/10.3329/seajph.v2i2.15942.