[1] Harvard Univ, Sch Publ Hlth, Dept Nutr, Boston, MA 02115 USA
[2] Harvard Univ, Sch Publ Hlth, Dept Epidemiol, Boston, MA 02115 USA
[3] Harvard Univ, Brigham & Womens Hosp, Sch Med, Channing Lab,Dept Med, Boston, MA 02115 USA
[4] Harvard Univ, Dana Farber Canc Ctr, Canc Epidemiol Program, Boston, MA 02115 USA
[5] Brigham & Womens Hosp, Dept Pathol, Boston, MA 02115 USA
[6] Harvard Univ, Sch Med, Dana Farber Canc Inst, Dept Med Oncol, Boston, MA 02115 USA