A large prospective trial will be necessary to assess the true benefit of this approach.
但需要更多数量和进一步前瞻性研究来评价其真正益处。
Study Design. A prospective randomized control trial.
研究设计：一个前瞻性随机试验。
Study Design. A prospective, randomized controlled trial.
前瞻性的随机对照研究。
Study Design. A prospective, randomized controlled trial.
前瞻性的随机对照研究。
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