Data monitoring committee
A data monitoring committee (DMC) – sometimes called a data and safety monitoring board (DSMB) – is an independent group of experts who monitor patient safety and treatment efficacy data while a clinical trial is ongoing. == Need for a DMC == Many randomized clinical trials are double-blind – no one involved with the trial knows what treatment is to be given to each trial participant.
Source: Wikipedia — Data monitoring committee (CC BY-SA 4.0)