1 Shuai Li, MD, PhD, Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Parkville, Victoria, Australia, Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom, Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, Victoria, Australia; Valentina Silvestri, PhD, Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy; Timothy R. Rebbeck, PhD, Harvard T.H. Chan School of Public Health, Boston, MA, Dana-Farber Cancer Institute, Boston, MA; Susan L. Neuhausen, PhD, Department of Population Sciences, Beckman Research Institute of City of Hope, Duarte, CA; John L. Hopper, PhD, Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Parkville, Victoria, Australia; Henriette Roed Nielsen, PhD, Department of Clinical Genetics, Odense University Hospital, Odence, Denmark; Laura Ottini, MD, Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy; and Antonis C. Antoniou, PhD, Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom.