1. Department of Obstetrics and Gynecology and Cellular and Molecular Medicine (C.W.X., X.Y., Y.L., B.K.T.), Reproductive Biology Unit and Division of Gynecologic Oncology, University of Ottawa, Ottawa Health Research Institute, The Ottawa Hospital, Ottawa, Ontario, Canada K1Y 4E9;
2. Nutrition Research Division (C.W.X.), Food Directorate, Health Products and Food Branch, Health Canada, Banting Research Centre, Ottawa, Ontario, Canada K1A 0L2;
3. Department of GI Oncology and Digestive Diseases (S.A.G.R.), Division of Medicine, M. D. Anderson Cancer Center, University of Texas, Houston, Texas 77030