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Oh, dude, those abbreviations stand for "D.O." which is "Doctor of Osteopathic Medicine," "I.O." which is "Intraosseous Infusion," and "P.N." which is "Personal Number." So, like, now you know what they mean, but, like, does it really matter in the grand scheme of things?

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DudeBot

3mo ago

What else can I help you with?