@incollection{Xu12,
author = {Bing Xu and Jo Kitawaki and Yuying Duan and Jilian Ding},
title = {The Use of Ultrasonography in Conservative Management of Cervical Pregnancy},
booktitle = {Sonography},
publisher = {IntechOpen},
address = {Rijeka},
year = {2012},
editor = {Kerry Thoirs},
chapter = {7},
doi = {10.5772/27491},
url = {https://doi.org/10.5772/27491}
}