Each trial is assigned one or more identification numbers by the institute, agency,
or organization sponsoring the trial. In addition, ClinicalTrials.gov assigns a
unique NCT identifier of the form NCTxxxxxxxx where each x is a numeric digit.
Use this box to search for a trial by NCT identifier or any other study
identification numbers.
Examples:
NCT00001789
97-h-0197
ia0006
actg 076