Chis, Ana, and Carmen Pop. “Correlations Between Neutrophil to Lymphocyte Ratio, Blood Eosinophils and Clinical Characteristics in Chronic Obstructive Pulmonary Disease”. Medicine and Pharmacy Reports (September 23, 2019). Accessed January 26, 2020. https://medpharmareports.com/index.php/mpr/article/view/1412.