| 31. | So this is why an unknown etiology is stipulated.
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| 32. | The science of why things occur is called etiology.
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| 33. | CDC has particular interest in characterizing the epidemiology and etiology of such cases.
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| 34. | These studies were negative, again arguing against a viral etiology of cancer.
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| 35. | The increases exponentially from 30 years of age, and etiology varies by age.
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| 36. | The role of hallucinogens in the etiology of visual snow is not entirely obvious.
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| 37. | Also another relatively common neoplastic etiology is meningiomas.
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| 38. | A second ancient narrative suggesting hemorrhagic fever etiology is that of Titus Lucretius Carus.
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| 39. | This proved the viral etiology of the syndrome.
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| 40. | It can also be classified according to etiology.
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