TY - BOOK AU - Olga Ramm TI - Risk Factors for the Development of Obstetric Anal Sphincter Injuries in Modern Obstetric Practice SN - 00297844 PY - 2018/// N1 - Serial; 29324610; 7478845; 131; 2; https://doi.org/10.1097/AOG.0000000000002444; Document_7478845_11376.pdf ER -