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osinq the w'erian 5near<br />
-13s-<br />
.e,mety data rwlied sxelusively oc deaLY<br />
osrtifioto 121-231 . The isportarca of histolnqic die? :«ses is that<br />
it provides the soet amtt.ta smsurenmt of disease status .<br />
Inclusim of other onocs can Wes the rssults either a+y frtm or<br />
tw[ds tle null value , de{andfoq on saerliec or :at they are related<br />
to sycur) . T .e latter ts tBe eost likely s[tu.ti.en since inclusion of<br />
orher arars .culd tnd to be ssndas. As .dditlonsl adven
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