@inbook{1184195804,
author={Mats J. Stensrud and Miguel A. Hernán},
editor={Livingston, Edward H. and Lewis, Roger J.},
title={Why Test for Proportional Hazards?},
booktitle={JAMA Guide to Statistics and Methods},
publisher={McGraw-Hill Education},
address={New York, NY},
year={2019},
url={jamaevidence.mhmedical.com/content.aspx?aid=1184195804}
}