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A fragrant environment (FE) reduced tumor growth. C57BL/6 mice were randomized into 2 groups: one was exposed to an environment containing α-pinene (180 ng/L in air) for 5 h/day (FE), and the other was exposed to a room containing pure air from 4 weeks prior to until 21 days after melanoma implantation. The tumor volume was measured at 7, 10, 14, 17, and 21 days after inoculation (n = 8 in each group, *P < .05).
