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This is to certify that your paper entitled «Renal Fractional Excretion of Sodium in Relation to Arterial Blood Gas and Spirometric Parameters in Chronic Obstructive Pulmonary Disease» was indexed with 5 pages, in the CIVILICA citation database, code COI:JR_JCTM-2-2_003, after evaluation and approval of the referees of the "Journal of Cardio-Thoracic Medicine Vol 2, Issue 2 , Year 2019.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above journal and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.