| http://www.w3.org/ns/prov#value | - Such direction may be oral direction (e.g., through oral instruction from, for example, a physician, veterinarian, or other health professional, or radio or television media (i.e., advertisement), or written direction (e.g., through written direction from, for example, a physician, veterinarian, or other health professional (e.g. , prescriptions), sales professional or organization (e.g., through,
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