LONG-TERM REOPERATION RATE AFTER MIDURETHRAL SLING OPERATIONSARI TULOKAS, MDPAIVI RAHKOLASOISALO, MD, PHD, SENIOR CONSULTANT, OBSTETRICS AND GYNECOLOGYMIKA GISSLER, MSOCSC, PHD, NATIONAL INSTITUTE FOR HEALTH AND WELFARE, FINLANDTOMI MIKKOLA, MD, ASS PROF, SENIOR CONSULTANT, OBSTETRICS AND GYNECOLOGYMAARIT MENTULA, MD, ASS PROF, SENIOR CONSULTANT, OBSTETRICS AND GYNECOLOGY