@article{Davis1998,
author = {Davis, D.L. and Gottlieb, M.B. and Stampnitzky, J.R.},
title= {Reduced ratio of male to female births in several industrial countries: A sentinel health indicator?},
year = {1998},
doi = {10.1001/jama.279.13.1018},
volume = {279},
number = {13},
pages = {1018--1023},
}