NCTN Studies Guideline Care Factoid (IMAGE) NIH/National Cancer Institute Caption A study shows that 82 of 182 phase 3 clinical trials led by SWOG or by other NCTN groups with SWOG participation were 'practice influential'. Credit National Cancer Institute Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.