Counselman, F L <br/><br/>
Quantitative B-hCG levels less than 1000 mIU/mL in patients with ectopic pregnancy: pelvic ultrasound still useful.  [electronic resource] 

 -  The Journal of emergency medicine   
 - 699-703 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0736-4679 
<br/><br/><label>Standard No.: </label>10.1016/s0736-4679(98)00081-x  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adolescent<br/>Adult<br/>Chorionic Gonadotropin, beta Subunit, Human--blood<br/>Emergency Service, Hospital<br/>Female<br/>Humans<br/>Pregnancy<br/>Pregnancy, Ectopic--blood<br/>Retrospective Studies<br/>Ultrasonography