In a placebo-controlled study, one group of patients would have undergone PTMR, while another would have had a catheter inserted, but no holes would have been made in the heart.
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释义
在安慰剂对照研究设计中,应该是一组病人进行PTMR,而另外一组则仅插入导管,但是没有在心脏上钻洞,而且参加者在研究完成之前不知道他们是否接受了激光治疗。
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