Endocrinology is a part of medicine that has to do with hormones and endocrine gland, people who work in that part are called "endocrinologists".
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I think the most important quality is courage. He must have courage in order to endure the difficulties of his assignment.
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The Treaty of Vienna of 25 March 1815 was the formal agreement of the allied powers — Austria, Great Britain, Prussia and Russia — committing them to wage war against Napoleon until he was defeated.
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