@article{ref1,
title="Morbidity among international seafarers examined at the Port Health Centre in Rotterdam in the years 1999 and 2000",
journal="International maritime health",
year="2002",
author="den Hoed, Willem",
volume="53",
number="1-4",
pages="167-171",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1641-9251",
doi="",
url="http://dx.doi.org/"
}