In addition,circulating endothelial cell count(CEC),plasma endothelin-1(ET-1) and nitric oxide(NO) levels were tested in healthy control group and PHD patients before and after treatment,respetively.

• 此外,测定健康组及两治疗组治疗前、后的循环内皮细胞(CEC)计数、血浆内皮素-1(ET-1)和一氧化氮(NO)含量的变化。