@article{Ray2012,
author = {Ray, J.G. and Henry, D.A. and Urquia, M.L.},
title= {Sex ratios among Canadian liveborn infants of mothers from different countries},
year = {2012},
doi = {10.1503/cmaj.120165},
journal = {Canadian Medical Association Journal},
volume = {184},
pages = {E492--E496},
}