A 41-year-old man comes to the office because of a 10-kg weight loss over the past 2 months. He also reports a 1-month history of sweating and palpitations during mild exercise, loose stools, and feeling irritable. Because of these symptoms, he is no longer able to concentrate on his work as an accountant. He also mentions that his eyes recently feel sore, as if somebody has thrown sand in them.
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