ACE2 and rheumatoid arthritis: In RA, ACE2 activity did not change after 6 M (40.1 [29–55] UF/mL; p = 0.201) and after 12 M (42.0 [32–52] UF/mL; p = 0.080) vs. B (34.6 [30–49] UF/mL).