A big category of grey literature, particularly for clinical research is clinical trials.
Searching registers for ongoing trials and trials with negative results is critical.
Finding out about unpublished studies, and including them in a systematic review when eligible and appropriate, is important for minimizing bias. Ongoing trials should be identified and tracked for possible inclusion in reviews on completion.
Search many key registries from around the world. This includes the:
Note: the search portal will tell you when data is updated from the different data providers. You may also want to search individual registries.
Trials at UniSA
University of South Australia staff and students undertaking a project that is a clinical trial will be required to register it in a publicly accessible trials registry prior to enrollment of the first participant, e.g. Australian New Zealand Clinical Trials Registry as a condition of ethics approval.