In an<unk> of a clinical trial, the parameters and conduct of the trial for a candidate drug or vaccine may be changed based on an interim analysis.<unk> typically involves advanced statistics to interpret a clinical trial endpoint. Schematic block diagram of an<unk> for a clinical trial
Adaptive design 
Universal design
Sham peer review
Therapeutic discovery project
Mutual standardisation
Scientific consensus
Exposure hierarchy
Prospective payment system