| http://www.w3.org/ns/prov#value | - ???Allergies are an abnormal reaction by a person's immune system to a normally harmless substance,??? explains Dr. Garrett Clark, DO, an osteopathic internal medicine physician from Erie, Pa., and an Assistant Clinical Professor of Internal Medicine at the Lake Erie College of Osteopathic Medicine. ???People can be allergic to all types of things, including pollens from trees, grasses and weeds,
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