Corrigendum to "Double Opposing Zplasty with VY Advancement of the Perineum: Long-term results of a new technique as an alternative to Fenton's operation for narrowing and splitting of the skin at the posterior vaginal fourchette" [Eur. J. Obstet. Gynecol. Reprod. Biol. 223 (2018) 46–49]. (July 2018)