title: Ectopic pregnancy: forget the "classic presentation" if you want to catch it sooner.
authors: Department of Family and Preventive Medicine, University of Oklahoma Health Sciences Center, 900 NE 10th Street, Oklahoma City, OK 73104, USA. kramakrishnan@ouhsc.edu
authors: Kalyanakrishnan
authors: K
authors: Ramakrishnan
authors: Dewey C
authors: DC
authors: Scheid