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Etiology - Wikipedia
Cause (medicine) - Wikipedia
ETIOLOGY Definition & Meaning | Dictionary.com
Causes of mental disorders - Wikipedia
Idiopathic disease - Wikipedia
What's the difference between etiology, pathogenesis, pathology ...
Etymology - Wikipedia
Four causes - Wikipedia
Etiology, Concept and Prophylaxis of Childbed Fever - Wikipedia
Etiology Definition & Meaning - Merriam-Webster