@article{ref1,
title="Progestins and osteoporosis. Does progestin contribute to the effectiveness of estrogen replacement therapy in menopause?",
journal="Revue Française de Gynécologie et d'Obstétrique",
year="1995",
author="Lopes, P.",
volume="90",
number="5-6",
pages="307-308",
abstract="<p>[Abstract unavailable]</p><p>Language: fr</p>",
language="fr",
issn="0035-290X",
doi="",
url="http://dx.doi.org/"
}