Show pageBacklinksCite current pageExport to PDFBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ====== Controlled study ====== An experiment or clinical trial in which two groups are used for comparison purposes. More: In a controlled exposure study, one group of participants is exposed to a substance (e.g. a pollutant) while those in the "control" group are not. controlled_study.txt Last modified: 2025/05/20 10:12by administrador