[1] NCI, Human Carcinogenesis Lab, Bethesda, MD 20892 USA
[2] NCI, Genet Epidemiol Branch, Bethesda, MD 20892 USA
[3] CHRU, Pathol Cellulaire Lab, Grenoble, France
[4] AFIP, Washington, DC USA
[5] Univ Utah, Dept Pathol, Salt Lake City, UT 84112 USA
[6] Mayo Clin, Rochester, MN USA