Figure 8.

Screenshots of the Arrowsmith web user interface that was employed by field testers during most of the two node searches described in this paper. This panel demonstrates a search to construct a list of diseases that are known to be characterized by the presence of both retinal detachment and aortic aneurysm, but not necessarily in the same patient (see Results). The filtered B-list, showing the user selecting a particular B-term, "Ehler Danlo syndrome" for further inspection. (The correct term is Ehlers-Danlos but the final -s was dropped when terms were stemmed during processing of the B-list. In our experience, stemming rarely, if ever, leads to confusion among users.)