Expression of concern: "Pre-emptive analgesia by nerve stimulator guided pudendal nerve block for posterior colpoperineorrhaphy" [Eur. J. Obstet. Gynecol. Reprod. Biol. 163/2 (2012) 200-203]. - Ismail MT; Elshmaa NS (European journal of obstetrics, gynecology, and reproductive biology, 2026)