@article{article8046d31e,
title   = {Association between ultrasound findings and serum levels of vascular endothelial growth factor in ampullary pregnancy},
author = {Cabar, Fábio Roberto and Pereira, Pedro Paulo and Schultz, Regina and Francisco, Rossana Pulcineli Vieira and Zugaib, Marcelo},
year = {2015},
doi = {10.1016/j.fertnstert.2014.12.100},
journal   = {Fertility and Sterility}
}