Linked from
The 12 pages that link to Otitis media, each with the reason it gives.
Mammalian middle earRelated: Fluid in the cavity can restrict ossicle motion and reduce hearing.
EardrumRelated: Middle-ear pressure and fluid can make the eardrum bulge and impair its movement.
Haemophilus influenzaeRelated: Nontypeable H. influenzae is one of the common bacterial causes.
Passive smokingRelated: Children exposed to tobacco smoke face increased risk of middle-ear disease.