ACE2 and COVID-19: Autopsies from 26 patients showed an increased expression of angiotensin-I-converting enzyme 2 (ACE2) in the diaphragm (predominantly localized at the myofiber membrane), as well as a two-fold higher degree of epimysial and perimysial fibrosis in the postmortem diaphragms of COVID-19 patients admitted to the ICU compared with the non-COVID-19 ICU control group, with comparable durations of mechanical ventilation and ICU length of stay.