@article{ref1,
title="Response to the letter by Dr Kawada: Differential effects of employment grade on the association between long working hours and problem drinking",
journal="American journal of industrial medicine",
year="2020",
author="Cheng, Wan-Ju and Pien, Li-Chung and Cheng, Yawen",
volume="63",
number="1",
pages="e100-e100",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0271-3586",
doi="10.1002/ajim.23057",
url="http://dx.doi.org/10.1002/ajim.23057"
}