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On-off phenomenon |
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Onychomycosis |
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Open excisional biopsy, breast |
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Ophthalmoplegic migraine |
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Opioid(s), for pain |
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Opioid use/opioid use disorder |
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Opium, tincture of |
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Optic atrophy, Wolfram syndrome |
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Organ failure. See also specific disorders |
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Orgasmic disorders/dysfunction |
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Oropharyngeal cancer |
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Orthokeratology |
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