RT Book, Section A1 Hafley, Gail E. A1 Leonardi, Sergio A1 Pieper, Karen S. A2 Lopes, Renato D. A2 Harrington, Robert A. SR Print(0) ID 57836005 T1 Chapter 8. Phase III and IV Clinical Trials T2 Understanding Clinical Research YR 2013 FD 2013 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-174678-6 LK accessbiomedicalscience.mhmedical.com/content.aspx?aid=57836005 RD 2024/04/20 AB Phase III trials are typically undertaken after Phase II studies have identified a potentially safe and effective dose that is considered likely to show an effect on a relevant clinical end point. Typically, regulatory approval in the United States requires two statistically significant, well-controlled clinical trials for the same indication.