Keywords: پیوند پوست ضخیم پوست; BMI; body mass index; DSST; donor site skin tissue; IRB; Institutional Review Board; LR; Ringer's lactate; STSG; split-thickness skin grafts; TBSA; total body surface area; Burns; Keratinocytes; Skin; Stem cells; Cell-spray auto-grafting; Wound healing;