TY - JOUR AU - Braffman, B H; Coleman, B G; Ramchandani, P TI - Emergency department screening for ectopic pregnancy: a prospective US study JO - Radiology VL - 190 PY - 1994 DO - 10.1148/radiology.190.3.7509494 SP - 797 EP - 802 N1 - et al. ER -