13.2 Features of Indexes.

An inverted form changes the order of a compound term, eg, “leukemia, B-cell.” Inversions are preferred when the indexer, depending on context and the coverage of the book, believes that the reader is most likely to look up information under the keyword, eg, under “leukemia” rather than under “B-cell.” Such inverted forms of entry should be cross-referenced (or double-posted) from the uninverted disease name. Avoid unnecessary inversions such as “fatigue syndrome, chronic” that break up commonly used compound terms. ...Less