CYP3A4 and mucositis: Docetaxel: ERCC1 (rs3212986) with mucositis grade ≥2 and CYP3A4*1B (rs2740574) with IRR grade ≥2 (p < 0.01)Paclitaxel:CYP2C8 (rs1113129) and CYP2C8 (rs1934951) with anemia grade ≥2 and ERCC1rs3212986with neuropathy grade ≥2