Cabar, Fabio Roberto, Paula Beatriz Fettback, Pedro Paulo Pereira, and Marcelo Zugaib. “ Serum Markers in the Diagnosis of Tubal Pregnancy ”. Clinics 63, no. 5 (January 1, 2008): 701–708. Accessed July 11, 2024. https://revistas.usp.br/clinics/article/view/17763.