A multi-centre quality improvement project to reduce the incidence of obstetric anal sphincter injury (OASI): study protocol.
Posy BidwellRanee ThakarNick SevdalisLouise SilvertonVivienne NovisAlexandra HellyerMegan KelseyJan van der MeulenIpek Gurol-UrganciPublished in: BMC pregnancy and childbirth (2018)
The OASI Project was retrospectively registered on the ISCTRN12143325 database date assigned 03/10/2017.