Histological sections of the healing of burn wound at 3, 7, and 14 DPB. The re-epithelialization process was completed in the hPRP-treated groups at 14 DPW. Moreover, rejuvenation of the skin appendages such as hair follicles was seen in the hPRP-treated groups at 14 DPB (Arrow). CS: crusty scab, IC: inflammatory cells, arrowheads: rejuvenation of hair follicles, yellow arrow: re-epithelialization. H&E stain, magnification x100.