@article {van Lier00848-2020, author = {Dirk van Lier and Matthijs Kox and Karine Santos and Hans van der Hoeven and Janesh Pillay and Peter Pickkers}, title = {Increased blood Angiotensin Converting Enzyme 2 activity in critically ill COVID-19 patients}, elocation-id = {00848-2020}, year = {2021}, doi = {10.1183/23120541.00848-2020}, publisher = {European Respiratory Society}, URL = {https://openres.ersjournals.com/content/early/2021/01/21/23120541.00848-2020}, eprint = {https://openres.ersjournals.com/content/early/2021/01/21/23120541.00848-2020.full.pdf}, journal = {ERJ Open Research} }