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Scratch test assay. (a) Remaining wound area in scratch test assay at 48 h. Rinsing with 50 µg/ml vitamin C significantly delayed wound closure compared with the control group (∗p ≤ 0.05). (b) Scratch test assay images of 50 µg/ml vitamin C and control groups at 0, 24, and 48 h after rinsing with vitamin C.
