“…36 The effects on both the internal and external sphincter are inconsistent as uncertain. Thus, six studies [16][17][18][19]37,38 showed an increase in both resting and squeeze pressures, whereas in eight studies 15,20,23,25,26,28,30,31 only an increase in squeeze pressure was observed. Finally, in one 21 study, there was no significant change in either of the two, in accordance with our own observations.…”