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Narayan, K. P.; Verma, S. K.; Kant, S.; Kushwaha, R. A. S.; Kumar, S.; Garg, R.; Srivastava, A.; Bajaj, D. K.; Sonkar, S. Predictors of Co-Morbidities in Chronic Obstructive Pulmonary Disease Patients at a Tertiary Care Centre in North India. Int J Res Med Sci 2019, 7, 4154-4160.