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![Drug resistance and combating drug resistance in cancer](https://image.oaes.cc/4a874645-f42e-413c-bb05-b0d961272afe/3039.fig.1.jpg)
Figure 1. Cells, protein factors, and mechanisms involved in drug resistance in cancer described in this review including extracellular ATP-induced resistance. ABC: ATP binding cassette; RTK: receptor tyrosine kinases; EGFR: epidermal growth factor receptor; TAM: tumor-associated macrophage