Analysis of information sources in references of the Wikipedia article "Clinical trial" in English language version.
{{cite journal}}: CS1 maint: DOI inactive as of December 2025 (link){{cite journal}}: CS1 maint: DOI inactive as of December 2025 (link){{cite journal}}: CS1 maint: DOI inactive as of December 2025 (link)Of the drugs started in clinical trials on humans, only 10 percent secure F.D.A. approval. ...
Of the drugs started in clinical trials on humans, only 10 percent secure F.D.A. approval. ...
{{cite journal}}: CS1 maint: DOI inactive as of December 2025 (link)