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2. National Cancer Institute2015-03-10National Cancer InstituteComplementary and Alternative Medicine Internet http://www.cancer.gov/cancertopics/cam
3. National Library of MedicineNational Institute of HealthMedical Subject Headings2015-03-10Complementary Therapies Internet http://www.ncbi.nlm.nih.gov/mesh/68000529
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5. Use of complementary and alternative medicine in cancer patients: a European survey