The CTN DISSEMINATION LIBRARY is a digital repository of resources created by and about NIDA’s National Drug Abuse Treatment Clinical Trials Network (CTN). The CTN Library includes CTN-related journal articles, posters, presentations, manuals, webinar recordings, and more. Need help accessing anything? Email us at ctnlib@uw.edu. Search the CTN Library Common Data Elements CTN Directory (2025) What’s New?