Cancer Drug Trials, 1998-2007 (IMAGE) Boston Children's Hospital Caption Prevalence of open Phase 1 cancer drug trials registered on clinicaltrials.gov, according to age. Credit Patrick Bibbins / Boston Children's Hospital Usage Restrictions Please credit as indicated 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.