Table 5 Serum levels of ET and NO at six-time points (\(\overline{x}\) ± SD) (μml/l)

5.51 ± 0.25

29.21 ± 2.67

5.45 ± 0.32

28.92 ± 3.85

0.428

0.701

5.16 ± 0.44^***

37.78 ± 2.75^***

5.37 ± 0.45

29.43 ± 3.55

0.047

0.000

5.10 ± 0.60^***

39.13 ± 3.24^***

5.19 ± 0.27^**

38.57 ± 3.49^***

0.456

0.473

4.92 ± 0.30^***

39.71 ± 3.05^***

4.99 ± 0.35^***

39.18 ± 3.30^***

0.346

0.473

4.87 ± 0.27^***

41.03 ± 3.71^***

4.92 ± 0.36^***

40.87 ± 3.53^***

0.539

0.848

4.80 ± 0.34^***

40.92 ± 3.28^***

4.84 ± 0.59^***

40.04 ± 2.88^***

0.670

0.222