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Laxman Kumar Soni; Priyanka Soni; Daljeet Kaur; C. R. Choudhary; K.C. Agarwal. Correlation of Vitamin D Deficiency With Frequent Exacerbations in COPD Patients at Tertiary Care Hospital in Western Rajasthan. Int. J. Heal. Clin. Res. 2022, 5, 586-588.