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Using R For Flexible Modelling Of Pre-Clinical Combination Studies

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Interaction Index – Berenbaum<br />

<strong>Combination</strong> Index – Chou & Talalay<br />

IC70<br />

IC50<br />

IC30<br />

τ<br />

τ<br />

d +<br />

d<br />

τ =<br />

A B<br />

DA<br />

DB<br />

= fraction of expected dose,<br />

assuming additivity, required to have<br />

same effect<br />

IC30 IC50 IC70<br />

AstraZeneca Discovery Statistics<br />

8 Chris Harbron, <strong>Using</strong> R <strong>For</strong> <strong>Flexible</strong> <strong>Modelling</strong> <strong>Of</strong> <strong>Pre</strong>-<strong>Clinical</strong> <strong>Combination</strong> <strong>Studies</strong>, USE-R 2009

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