/r/askscience
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Why isn't the feeling of being a man/woman trapped in a man/woman's body considered a mental illness?
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AskScience AMA Series: I'm Iñigo San Millán, a researcher who trains world-class athletes, including the two-time Tour de France winner, with the goal of learning more about cancer, diabetes and other diseases. I've learned exercise is the most powerful medicine in the world. AMA!
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