title: Discussion: 'High risk for third- and fourth-degree perineal lacerations' by Hamilton et al.
authors: Department of Obstetrics and Gynecology, Washington University in St Louis School of Medicine, St Louis, MO, USA.
authors: George A
authors: GA
authors: Macones
authors: Alison G
authors: AG
authors: Cahill
authors: David M
authors: DM
authors: Stamilio
authors: Anthony
authors: A
authors: Odibo
mesh_terms: D036861:Delivery, Obstetric / Q000009:adverse effects*; D005260:Female; D006801:Humans; D022125:Lacerations / Q000145:classification / Q000209:etiology*; D010502:Perineum / Q000293:injuries*; D011247:Pregnancy; D012107:Research Design; D018570:Risk Assessment / Q000379:methods*