CRP and chronic obstructive pulmonary disease: Inflammatory indicators: PCT—procalcitonin assay, CRP—C reactive protein, NEU—neutrophil, PLT—platelet; Comorbidities: AH—arterial hypertension, AF—atrial fibrillation, CHD—coronary heart disease, HF—heart failure, CKD—chronic kidney disease, COPD—chronic obstructive pulmonary disease, DM2—diabetes mellitus 2; Secondary infections: NDM—New Delhi metallo-β-lactamase, MRSA—Methicillin-resistant Staphylococcus aureus, GRE—Glycopeptide-resistant Enterococcus, VRE—Vancomycin-resistant Enterococci.