一个研究组认为他们已经做到了这一点，并在美国化学年会上展示了他们的作品。
They presented their work at the annual meeting of the American Chemical Society.
两个比较组必须接受相同的化学治疗和支持性照顾。
Both study arms had to receive identical chemotherapy and supportive care.
两个比较组必须接受相同的化学治疗和支持性照顾。
Both study arms had to receive identical chemotherapy and supportive care.
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