Failure to conduct a placebo-controlled trial may be unethical.Peter J. CohenThe American journal of bioethics : AJOB(2010)引用 6|浏览2暂无评分关键词Biomedical and Behavioral ResearchAI 理解论文溯源树样例生成溯源树,研究论文发展脉络Chat Paper正在生成论文摘要