Please note that as a general rule, the SUTD-IRB does not conduct retrospective reviews on research/ studies that have been already completed as these could be problematic. In particular, changes cannot be made to the research methodology if ethical issues are uncovered, e.g., if research participants were not informed that their participation in class activities was part of a research study, if no informed consent had been sought for their participation in the research or participants did not agree to their data being used for research purposes.