title: Risk factors for retained instruments and sponges after surgery.
authors.forename: Richard T L
authors.initials: RT
authors.lastname: Couper
mesh_terms: D015992:Body Mass Index; D005547:Foreign Bodies / Q000209:etiology*; D006801:Humans; D019300:Medical Errors; D009765:Obesity; D012307:Risk Factors; D013525:Surgical Instruments; D015503:Surgical Sponges