To see the studies in a particular cell, just click on that cell. A list of the studies will come up.
If the cell contains only one or two studies, the pop-up box will list them. For each study, the column on the right has the study abstract. (This is a summary of the study which is published at the top of the study and is written by the study’s authors.) Against each one is a blob, the colour of which indicates the type of study (RCT, QED, protocol or systematic review).