%0 Journal Article %T Polytherapy and Targeted Cancer Drug Resistance %J - %D 2019 %R https://doi.org/10.1016/j.trecan.2019.02.003 %X The emergence of drug resistance is a barrier to effective cancer treatment. Resistance develops during chemotherapy, radiotherapy, molecularly targeted therapy, and immunotherapy in most patients with cancer and prevents their long-term survival %U https://www.cell.com/trends/cancer/fulltext/S2405-8033(19)30019-6