At 3 months after treatment , the IIEF-5 scores were 15.77 + / - 2.05 , 18.07 + / - 2.24 and 19.37 + / - 3.76 in the three groups , dramatically higher in B and C than in A ( P < 0.001 ) as well as in C than in B ( P < 0.05 ) .