Children can often appear tired or irritable, but when these symptoms become an ongoing problem, it could be a sign of something more serious. Fatigue, pale skin, and even a bad mood can be signs of ...
From the Medical Service, Robert Breck Brigham Hospital. Within the usually clear central area of the erythrocyte, there is a small island (bull's-eye) of hemoglobin, hence the resemblance to a target ...
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