SERPING1 and hereditary angioedema: Noradrenaline was higher in patients at R (p = 0.05) and increased in both groups after tilt test (R/T values: 301.4±132.9pg/ml/467.4 ± 193.6 pg/ml, p<0.001 in C1-INH-HAE patients; 210.5 ± 89.6/407.4 ± 128.5 pg/ml in the controls, p< 0.001).