...多中心临床研究[gap=2762]d; children phlegm-heat cough with food accumulation syndrome; acute bronchitis; multi-center clinical study...
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multi center clinical study 多中心临床试验
Objective To evaluate the safety of Shearing fracture ligation combined PPH for mixed hemorrhoids with a multi-center clinical study.
目的通过多中心临床研究进一步评价剪口结扎结合PP H术治疗混合痔的有效性和安全性。
Research MethodsBased on the research literature, the combination of expert advice, the establishment of COPD epidemiological information questionnaire to start multi-center clinical study.
研究方法以文献调研为基础，结合专家意见，建立COPD流行病学信息调查表，展开多中心临床调研。
AIM: to study the qualitative methods for analyzing laboratory variables from multi-center clinical trial.
前言：目的探讨多中心临床试验中实验室数据的定性分析方法。
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