@article{Carson2011,
author = {Carson, C. and Kelly, Y. and Kurinczuk, J.J. and Sacker, A. and Redshaw, M. and Quigley, M.A.},
title= {Effect of pregnancy planning and fertility treatment on cognitive outcomes in children at ages 3 and 5: Longitudinal cohort study},
year = {2011},
doi = {10.1136/bmj.d4473},
volume = {343},
pages = {4473},
}