Is ultrasound needed for women with beta-HCG of less than 500 mIU/mL?

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Bibliographic Details
Title: Is ultrasound needed for women with beta-HCG of less than 500 mIU/mL?
Authors: James, J.1, Pymar, H.1
Source: Contraception. Sep2014, Vol. 90 Issue 3, p343-344. 2p.
Database: Academic Search Ultimate
Description
ISSN:00107824
DOI:10.1016/j.contraception.2014.05.176