@article{Zhu2006,
author = {Zhu, J.L. and Basso, O. and Obel, C. and Bille, C. and Olsen, J. },
title= {Infertility, infertility treatment, and congenital malformations: Danish national birth cohort},
year = {2006},
doi = {10.1136/bmj.38919.495718.AE},
journal = {British Medical Journal},
volume = {333},
number = {7570},
pages = {679},
}