Figure 2.

Research process: in stage 1 a first search using the search terms: “iron oxide AND (the respective) cancer AND therapy” was conducted, then the abstracts of these search results were screened. In stage 2, the search was specified to results on iron oxide-based hyperthermia therapy. In the last stage, stage 3, priory elected eligible full papers were examined and their findings summarized in this review. Numbers indicate the number of articles found in each category after each research stage.