Funding for this research was provided by:
Institute of Circulatory and Respiratory Health (FDN143285)
National Science Foundation (81490530, 2018GZR0201002, 81270125)
Received: 17 February 2020
Accepted: 20 February 2020
First Online: 3 March 2020
Compliance with ethical standards
: Josef Penninger is the founder and a shareholder of Apeiron, the company that makes rhACE2. Arthur Slutsky has been a paid consultant for Apeiron. No other conflicts of interested have been reported.