A Survey on the Prevalence of IVS14 + 1G > A Mutation of the Dihydropyrimidine Dehydrogenase Gene Among a Group of Colorectal Cancer Patients in Northeast Iran, the Relevance of Fluoropyrimidine Based Chemotherapy Toxicity - Sadeghi Ivari, Mahboobeh; Salek, Roham; Hosseini, Bibi Ashraf; Behravan, Javad; Aledavood, Amir (Reports of Radiotherapy and Oncology, 2016)