Disease Underlies Hatfield-McCoy Feud

Jerry Hatfield, left, and Ron McCoy pose for a photo at the Hatfield-McCoy feud marker in Pikeville, Ky., on June 7, 2001. They were attending the annual Hatfield-McCoy Reunion Festival that runs over the weekend in the area. (Rhonda Simpson - AP)

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Associated Press National Writer Allen G. Breed in Raleigh, N.C., contributed to this report.

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On the Net:

VHL Family Alliance: http://www.vhl.org/

NIH: http://www.ninds.nih.gov/disorders/von_hippel_lindau/von_hippel_lindau.htm

http://www.nlm.nih.gov/medlineplus/ency/article/000340.htm

(An earlier version of the story misidentified Ron McCoy of Durham, N.C., as 'Randy')