Dr. Jahnavi T, Dr.Ravi Kumar U., Dr. Sravanthi P., and Dr.Balakrishna N, “A CROSS-SECTIONAL STUDY ON COPD IN NON-SMOKERS AT KING GEORGE HOSPITAL IN VISAKHAPATNAM, INDIA”, J Popl Ther Clin Pharmacol, vol. 32, no. 7, pp. 707–713, Aug. 2025, doi: 10.53555/xz1gfd62.