Çakmak, F. and Tekin, E. 2022. Correlation of the end-tidal CO2 value with arterial blood gas parameters – evaluation of the treatment efficacy of COPD exacerbation in the emergency department. European Journal of Clinical and Experimental Medicine. 20, 3 (Sep. 2022), 316–322. DOI:https://doi.org/10.15584/ejcem.2022.3.9.