Etiology (alternately "aetiology") is the study of causation. In medicine it specifically refers to the causation of diseases or pathologies. The term is also used in philosophy, physics and biology in reference to the causes of various phenomena.
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... is 39 years. For every 100 females there are 104.2 males. For every 100 females age 18 and over, there are 97.8 males.
The median income for a household in the town is ...