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Change of tumor volume. Tumor volume (a) and ratio volume (b) of CT-26 tumor cell xenografts. Tumor volumes were measured once a week after sample treatments. The group treated with a PSi/EtOH:PEG solution followed by NIR laser treatments (4 times for 2 min at 1.5 W/cm2 each time with a time interval of 2 min) shows efficient tumor growth inhibition compared with other experimental groups.
