| http://www.w3.org/ns/prov#value | - riods with extant comorbid conditions that provoke inflammation in or around the ET, such as viral upper respiratory tract infection, allergic rhinitis, and GERD.22- 24 Eustachian tube dysfunction occurs when an extant ETF is insufficient to maintain ME pressure greater than the critical underpressure that precipitates disease (eg, OME) and can be either constitutive or secondary (compromised ETF
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