DOI:
10.1055/s-00030576
Revista Brasileira de Ginecologia e Obstetrícia / RBGO Gynecology and Obstetrics
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References
Peisner DB, Timor-Tritsch IE.
The discriminatory zone of beta-hCG for vaginal probes.
J Clin Ultrasound 1990;
18 (04) 280-285 Doi: 10.1002/jcu.1870180411
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