Clinical, Serological, and Histopathological Similarities Between Severe COVID-19 and Acute Exacerbation of Connective Tissue Disease-Associated Interstitial Lung Disease (CTD-ILD) oleh Daniel Gagiannis, Julie Steinestel, Carsten Hackenbroch, Benno Schreiner, Michael Hannemann, Wilhelm Bloch, Vincent G. Umathum, Niklas Gebauer, Conn Rother, Marcel Stahl, Hanno M. Witte, Hanno M. Witte, Hanno M. Witte, Konrad Steinestel