“…The author was contacted but no response was obtained [ 1 2 , 1 8 , 1 9 , 2 1 -2 6 ] . S e v e n s t u d i e s [12,20,21,23,24,26,27] reported the involvement of experienced surgeons, but in three studies [19,22,28] some surgeons were in their learning curve.…”