| http://www.w3.org/ns/prov#value | - These include the following:ChemopreventionChemoprevention is the use of drugs, vitamins, or other substances to reduce the risk of developing cancer or to reduce the risk that cancer will recur (come back).Photodynamic therapyPhotodynamic therapy (PDT) is a cancer treatment that uses a drug and a certain type of laser light to kill cancer cells.
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