[1]Natl Inst Hlth, Natl Canc Inst, Dept Hlth & Human Serv, Div Canc Epedimiol & Genet, Bethesda, MD USA.
[2]Dartmouth Med Sch, Dept Community & Family Med, Hanover, NH USA.
[3]Univ Athens, Sch Med, Dept Hyg & Epidemiol, GR-10679 Athens, Greece.
[4]Harvard Sch Publ Hlth, Dept Epidemiol, Boston, MA USA.
[5]Fudan Univ, Sch Publ Hlth, Dept Epidemiol, Shanghai, Peoples R China.
[6]Beth Israel Deaconess Med Ctr, Dept Obstet & Gynecol, Boston, MA USA.
[7]Univ Calif Los Angeles, Keck Sch Med, Reprod Endocrine Res Lab, Los Angeles, CA 90024 USA.
[8]Natl Canc Inst, Div Canc Control & Populat Sci, Bethesda, MD USA.
[9]Karolinska Inst, Dept Med Epidemiol & Biostat, S-10401 Stockholm, Sweden.
[10]Univ Massachusetts, Med Ctr, Dept Canc Biol, Worcester, MA USA.