Scaldmodelsofratsweremadereferri toWalkerandMason ’ sreports [ 6 ] . Thehairinanareaof8cm × 6cmonthebackofeachratwas removedbyusingdepilatory(self‐made。Containing8gofsodiumsulfuretand4 100mL). Theratswereanaesthetizedbyintra‐abdominalinjecting1.8%sodiumpe ......