"The lesson I've learned from 40 years of cardiology is that when there's this much smoke, there's often some fire, " said Paul Thompson, a sports-medicine specialist and veteran marathoner who is chief of cardiology at Hartford Hospital in Connecticut.

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But as Thompson's potential star witness, Huang may have as much value bound as unbound.

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"You don't have to do much wrong to be making a bogey out there, so it's pretty impressive, " Ogilvy said of Thompson's final round.

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