title: Abdominal ultrasound in emergency medicine.
mesh_terms: D000005:Abdomen / Q000000981:diagnostic imaging; D006063:Chorionic Gonadotropin / Q000032:analysis; D004630:Emergencies; D006801:Humans; D011863:Radioimmunoassay; D014463:Ultrasonography
chemical_list: D006063:Chorionic Gonadotropin