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"Nasopharyngeal carcinoma (NPC) affects cells lining the nasopharynx. The majority of NPC cases can be cured by radiation therapy, however ~20% are resistant to radiation treatment."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2013-11-nasopharyngeal-carcinoma-patient-response-therapy.html>