Fig. 4

Serum Angiotensin-converting enzyme (ACE) 1 and 2 levels linked to the I/D and A/T polymorphisms, Kruskal–Wallis test. A ACE1 and I/D polymorphism: n(DD) = 25 (left), n(ID) = 31 (mid), n(II) = 13 (right), *p = 0.04. B ACE2 and I/D polymorphism: n(DD) = 25 (left), n(ID) = 31 (mid), n(II) = 13 (right), *p = 0.13.C ACE1 and A/T polymorphism: n(AA) = 23 (left), n(AT) = 31 (mid), n(TT) = 15 (right), *p = 0.03. D ACE2 and A/T polymorphism: n(AA) = 23 (left), n(AT) = 31 (mid), n(TT) = 15 (right), *p = 0.30. Box and Whiskers: Median, lower and upper quartile, lower and upper extreme