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Clinical Trial Phases: What Happens in Phase 0, I, II, III, and IV
Types and Phases of Clinical Trials - American Cancer Society
NIH Clinical Research Trials and You
Clinical trials - World Health Organization (WHO)
What Are The Phases Of Clinical Trials | Clinical Trial Phases
Step 3: Clinical Research | FDA - U.S. Food and Drug Administration
Basics About Clinical Trials - FDA
Clinical Trial Phases - MD Anderson Cancer Center
Understanding the different clinical trial phases
Phases of clinical trials - Cancer Research UK