[1] Natl Canc Inst, Div Canc Epidemiol & Genet, Clin Genet Branch, Bethesda, MD USA
[2] Natl Canc Inst, Clin Genet Branch, DCEG, Rockville, MD USA
[3] Natl Canc Inst, Div Canc Epidemiol & Genet, Clin Genet Branch, Rockville, MD USA
[4] NIH Natl Canc Inst, Div Canc Epidemiol & Genet, Bethesda, MD USA