TY  - GEN
AU  - Hauswald,M
AU  - Williamson,M R
TI  - Transvaginal ultrasonography in patients with human chorionic gonadotropin values less [corrected] than 1,000 mIU/mL: how often is the study diagnostic?
SN  - 0196-0644
PY  - 1997///0821
KW  - Chorionic Gonadotropin, beta Subunit, Human
KW  - blood
KW  - Diagnosis, Differential
KW  - Female
KW  - Humans
KW  - Predictive Value of Tests
KW  - Pregnancy
KW  - Pregnancy, Ectopic
KW  - Risk
KW  - Ultrasonography
KW  - economics
KW  - Vagina
N1  - Publication Type: Editorial; Comment
ER  -