@article{ref1,
title="Letter from Cali, violence in the americas",
journal="JAMA journal of the American Medical Association",
year="1994",
author="Chelala, C. and de Roux, G. I.",
volume="271",
number="10",
pages="727-727",
abstract="Abstract unavailable.",
language="",
issn="0098-7484",
doi="",
url="http://dx.doi.org/"
}