将一篇文章翻译成外语。


以下是一篇英文文章：
"An open-label, randomized, controlled trial was conducted to compare the efficacies of three widely used treatments for chronic hepatitis C in patients who had previously received interferon-α monotherapy. No significant differences were observed in sustained virologic response rates among the three treatment groups."
一项开放标签随机对照试验旨在比较三种广泛使用的治疗慢性丙型肝炎的疗效，对象为之前接受过干扰素-α单药治疗的患者。结果显示，三个治疗组的持续病毒学反应率并无显著差异。