From: MedGen
The NCBI Handbook [Internet]. 2nd edition.
Bethesda (MD): National Center for Biotechnology Information (US); 2013-.
NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.
Figure 3.
Term hierarchies in MedGen. The hierarchies are illustrated in tabbed navigation format. (A) Illustrate the GTR® hierarchy alongside with icons, which provide links to corresponding Clinical tests, Research tests, OMIM®, or GeneReviews™ Records. (B) Illustrate the hierarchy reported in MedGen. Small arrows on the left allow for expansion and contraction of the branches of a large hierarchical tree to ease navigation.