Authoritarian regimes are also sometimes subcategorized by whether they are personalistic or populist. Personalistic authoritarian regimes are characterized by arbitrary rule and authority exercised mainly through patronage networks and coercion rather than through institutitions and formal rules..
Fluid accumulation is the most common cause of conductive hearing loss in the middle ear, especially in children. Major causes are ear infections or conditions that block the eustachian tube, such as allergies or tumors.
http://library.thinkquest.org/15390/causé¥?/a>. Otosclerosis is a common cause of hearing loss. Although in the past people have thought that it was caused by diseases such as scarlet fever, measles, and ear infections, in fact these have nothing to do with its development. It is a hereditary disease in which portions of the middle ear or inner ear develop growths like bony sponges.