RESULTS	Ulcers treated with the highest dosage of Dermagraft , one piece applied weekly for 8 weeks ( group A ) , healed significantly more often than those treated with conventional wound closure methods ; 50 % ( 6 of 12 ) of the Dermagraft-treated and 8 % ( 1 of 13 ) of the control ulcers healed completely ( P = 0.03 ) .\