Sometimes they take 4 vials, sometimes they can take up to 13 or so. Why is that? Is it **only** because they run different tests on different vials or they also compare stuff to make sure samples are not compromised?
In: 4
At least in part because of the different tests they may be running. Some may need their own vial for volume and solution reasons, some may just need larger volumes and depending on why you’re getting blood drawn may dictate different tests getting run.
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