@article{ref1,
title="The physician depression scale (PDS): a factor analytic study",
journal="Pharmakopsychiatrie, Neuro-Psychopharmakologie",
year="1973",
author="Rickels, K. and Downing, R. W. and Spaeth, H.",
volume="6",
number="6",
pages="280-286",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-7098",
doi="10.1055/s-0028-1094392",
url="http://dx.doi.org/10.1055/s-0028-1094392"
}