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789
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BMP-6 expression seems to be indirectly increased in re-
sponse to estrogen administration. Further studies are re-
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the action of estrogen on the skeleton in other species
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We are grateful to Dr. S. Colley for his help in cloning the
PDGF-A and PDGF-B cDNA probes and to Ms. R. Gibson
for her assistance in processing femurs.
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