has process quality clinical trial early phase 1 clinical trial Early Phase 1 clinical trial Phase 0 clinical trial A clinical trial that is at Early Phase 1 or Phase 0 A clinical trial that is at an Early Phase i or Phase 0, which is designed to use an investigational agent that is available only in very limited quantities and which has never previously given to humans or for which there is extremely limited human experience. Phase 0 clinical trials are intended to enable researchers to understand the path of the drug in the body and its efficacy. Adverse event reporting in Phase 0 trials is expedited. [def-source: NCI] Leon Li, Asiyah Lin, Oliver He https://en.wikipedia.org/wiki/Clinical_trial Pre-Clinical Trial Phase 0 trial http://purl.obolibrary.org/obo/NCIT_C54721