@article{doi:10.1001/jama.2012.4796,
author = {Kuehn BM},
title = {LOnger labor},
journal = {JAMA},
volume = {307},
number = {20},
pages = {2139},
year = {2012},
doi = {10.1001/jama.2012.4796},
URL = { + http://dx.doi.org/10.1001/jama.2012.4796},
eprint = {/data/Journals/JAMA/23565/jch120119_2139b_2139.pdf}
}