健康兔血清作阴性血清对照。
The blood of a healthy rabbit was taken as negative control serum.
同时设立生理盐水血清作为阴性对照。
Meanwhile, the serum contained normal saline was set as negative control.
对48例血清HCV-RNA阳性和35例HCV-RNA阴性的慢性丙型肝炎（慢丙肝）患者外周血T淋巴细胞亚群进行观察，并与20例正常人对照。
Peripheral T-lymphocyte subsets of 48 HCV-RNA seropositive and 35 HCV-RNA seronegative chronic hepatitis -C patients were investigated arid 20 normal subjects were kept as control.
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