BibTex format
@article{Joffe:2015:10.1097/EDE.0000000000000383,
author = {Joffe, M},
doi = {10.1097/EDE.0000000000000383},
journal = {EPIDEMIOLOGY},
pages = {E67--E67},
title = {Selection Bias Due to Parity-conditioning in Studies of Time Trends in Fertility},
url = {http://dx.doi.org/10.1097/EDE.0000000000000383},
volume = {26},
year = {2015}
}