<prompt> Good clinical practices GCP are not a pa of:-Phase I Clinical TrialsPhase II Clinical TrialsPhase IV clinical trialsPre - Clinical trials  <response>: Pre - clinical trials are performed on animals lab - experiments lab - trials, so good clinical practices GCP are not required. Phase I healthy human volunteers, Phase II, III, IV patients require GCP. Phase Unit of study Purpose PRECLINICAL PHASE Lab experiments Animals Pretesting CLINICAL PHASE Phase 0 Healthy human volunteers Micro - dosing Phase I Healthy human volunteers Safety and non - toxicity profile Phase II Patients Effectiveness Phase III Patients Comparison with existing drugs Phase IV Patients Long term side effects 