I'm not sure that this is 400 words but this is what I came up with.
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The main difference between EHR and PHR systems is that EHR systems are manged by health care providers and PHR systems are used by the patient. The terms EHR, PHR, and even electronic medical record (EHR), are frequently used interchangeably, but are actually quite different.
Answer:
Keep the samples in bins for each specific sample, label each bin so that the samples don't get mixed up.
Explanation:
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