Elevated nitric oxide in blood is key to high altitude function for Tibetans

How can some people live at high altitudes and thrive while others struggle to obtain enough oxygen to function?

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<p><a href="http://www.physorg.com/news112962760.html">Elevated nitric oxide in blood is key to high altitude function for Tibetans</a></p> <p>How can some people live at high altitudes and thrive while others struggle to obtain enough oxygen to function? </p>