mononucleosis . And as they recall, just before bed one night, Denny took his medicine and then talked about where he wanted to sleep.

At the time, Denny was 18; he had begun competing in triathlons near the family's home in Olathe, Kan., outside Kansas City.

"Denny that night wanted to sleep on the couch," Dennis recalls. "He had mono, but he was ... ...

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