Tullar recommends using more main entries or first-level subentries rather than going beyond a third level of subentry, as in this example, adapted from Tullar: Not:cancer treatment of pharmacologic cyclophosphamide for adverse effects of thrombocytopenia Preferred:cancer treatment of pharmacologic See also individual drugs chemotherapy adverse effects of See also individual drugs cyclophosphamide adverse effects of thrombocytopenia from drug-induced disorders from cyclophosphamide thrombocytopenia thrombocytopenia from cyclophosphamide drug-inducedEven when a main heading cites the entire page range of the discussion of a particular topic, it is useful to include subtopics as subentries so that the reader is aware that the subtopic has been covered in that discussion, as well as elsewhere in the text. The following example is ...
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