@incollection{Wang11,
author = {Yu-dong Wang and Wei-wei Cheng and Xiao-ping Wan},
title = {Clinical Application of One-Step Diagnosis for Ectopic Pregnancy by HCG Ratio: Hemoperitoneum Versus Venous Serum},
booktitle = {Ectopic Pregnancy},
publisher = {IntechOpen},
address = {Rijeka},
year = {2011},
editor = {Michael Kamrava},
chapter = {8},
doi = {10.5772/18156},
url = {https://doi.org/10.5772/18156}
}