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Onychomycosis Severity Index
Oocyte cryopreservation
Oophoropexy
Opacification, air-space, on x-ray
Open lateral internal sphincterotomy
Ophthalmoplegic migraine
Opiate abuse
Opiate addiction
Opiate overdose
Opioid poisoning
Oppositional defiant disorder
Opsoclonus
Opsoclonus-myoclonus-ataxia syndrome
Optic nerve cupping
Optic nerve fenestration, for idiopathic intracranial hypertension
Optic papillitis
Oral dysesthesia
Oral glucose challenge test, for dumping syndrome
Displaying items 91 - 120 of 253