@article{Qian2004,
author = {Qian, X. and Tang, S. and Garner, P.},
title= {Unintended pregnancy and induced abortion among unmarried women in China: A systematic review},
year = {2004},
doi = {10.1186/1472-6963-4-1},
volume = {4},
number = {1},
pages = {1},
}