@article{ref1,
title="A longitudinal twin study of physical aggression during early childhood: Evidence for a developmentally dynamic genome",
journal="Psychological medicine",
year="2014",
author="Lacourse, E. and Boivin, M. and Brendgen, Mara R. and Petitclerc, A. and Girard, April L. and Vitaro, F. and Paquin, S. and Ouellet-Morin, I. and Dionne, G. and Tremblay, R. E.",
volume="44",
number="12",
pages="2617-2627",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0033-2917",
doi="10.1017/S0033291713003218",
url="http://dx.doi.org/10.1017/S0033291713003218"
}