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RE: [IPk] Retest results.

 If you re-test after "an unexpectedly high reading" you are of course biasing
the outcome. The fact that the first reading was unexpectedly high makes it much
more likely that it was incorrect (e.g. due to finger contamination) and that a
second (more accurate) reading will therefore be substantially lower.

 FWIW, when you start a new Dexcom sensor (or restart an old one), you need to
provide two independent fingerstick reading. Using my Freestyle Lite meter, I
find that there can be a discrepancy of 10% between the two readings, but I
don't see any obvious bias as to which one is the higher.

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