Fig. 1From: YKL-40 as a new promising prognostic marker of severity in COVID infectionYKL-40 concentrations in Healthy Subjects (HS), Chronic Obstructive Pulmonary Disease (COPD), Interstitial Lung Diseases (ILD) and COVID-19 patients. A Kruskal–Wallis test and a post hoc Dunn test were usedBack to article page