In the Skin Stretch group , a significant reduction of the surface area from 65.4 cm ( 2 ) ( 13.6-129 .1 ) to 13.4 cm ( 2 ) ( 3.0-36 .6 ) was found at 3 months ( p = 0.028 ) and at 12 months postoperatively ( 65.4 cm ( 2 ) ( 13.6-129 .1 ) to 33.0 cm ( 2 ) ( 8.9-63 .7 ) , p = 0.046 , Wilcoxon signed ranks test ) .