Democratic presidential nominee Hillary Clinton leaves her daughter's apartment building earlier this week after becoming dehydrated at a Sept. 11 memorial service. Brendan Smialowski /AFP/Getty Images hide caption

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Brendan Smialowski /AFP/Getty Images

Randy Curtis has hemophilia. These days he regularly injects the clotting factor treatments he needs from home, as a relatively easy way of preventing the episodes of catastrophic bleeding that plagued him as a child. Lesley McClurg/KQED hide caption

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Lesley McClurg/KQED

Baby Boomers With Hemophilia Didn't Expect To Grow Old

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A mother and daughter herd their yaks along a highway on the Tibetan plateau. Frederic J. Brown/AFP/Getty Images hide caption

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Frederic J. Brown/AFP/Getty Images

With Help From Extinct Humans, Tibetans Adapted To High Altitude

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Secretary of State Hillary Clinton on Dec. 4 in Brussels, before she fell ill. Kevin Lamarque/AFP/Getty Images hide caption

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Kevin Lamarque/AFP/Getty Images