Women’s College Research Institute, Women’s College Hospital, Toronto, ON, Canada

Kelly Metcalfe, Joanne Kotsopoulos, Ping Sun, Steven A. Narod & Aletta Poll

Lawrence S. Bloomberg Faculty of Nursing, University of Toronto, Toronto, ON, Canada

Kelly Metcalfe

International Hereditary Cancer Center, Department of Genetics and Pathology, Pomeranian Medical University, Szczecin, Poland

Tomasz Huzarski, Jacek Gronwald & Jan Lubinski

Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada

Joanne Kotsopoulos & Steven A. Narod

Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, ON, Canada

Raymond Kim & Jeanna McCuaig

The Norwegian Radium Hospital, Department for Medical Genetics, Oslo University Hospital, Oslo, Norway

Pal Moller

Department of Medicine, Vanderbilt University, Nashville, TN, USA

Tuya Pal

Division of Human Genetics, The Ohio State University Medical Center, Comprehensive Cancer Center, Columbus, OH, USA

Amber Aeilts, Leigha Senter & Kevin Sweet

Department of Medical Oncology, Sunnybrook Odette Cancer Center and University of Toronto, Toronto, ON, Canada

Andrea Eisen

Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA

Beth Karlan

Department of Oncology, Juravinski Cancer Centre, Hamilton, ON, Canada

Louise Bordeleau

Beth Israel Deaconess Medical Center, Cancer Risk and Prevention Program, Boston, MA, USA

Nadine Tung

Department of Medicine and Human Genetics, University of Chicago, Chicago, IL, USA

Olufunmilayo Olopade

Cancer Genetics Program, Beaumont Hospital, Royal Oak, MI, USA

Dana Zakalik

Department of Obstetrics and Gynecology and Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria

Christian F. Singer

McGill Program in Cancer Genetics, Department of Oncology, McGill University, Montreal, QC, Canada

William Foulkes

Division of Experimental Pathology and Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA

Fergus Couch

Department of Population Sciences, Beckman Research Institute of City of Hope, Duarte, CA, USA

Susan L. Neuhausen & Linda Steele

Genomic Medicine Institute, Center for Personalized Genetic Healthcare, Cleveland Clinic, Cleveland, OH, USA

Charis Eng

North York General Hospital, Toronto, ON, Canada

Lea Velsher

Division of Medical Oncology, Medical Oncology, Odette Cancer Centre of Sunnybrook Health Sciences Centre, Toronto, ON, Canada

Ellen Warner

Bhalwani Familial Cancer Clinic, Princess Margaret Cancer Centre, Toronto, ON, M5G 2C1, Canada

Susan Armel

Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA

Howard Saal

Division of Medical Genetics, University of Saskatchewan, Royal University Hospital, Saskatoon, SK, Canada

Edmond Lemire

Shared Health Program of Genetics and Metabolism, Health Sciences Centre, Winnipeg, MB, Canada

Kim Serfas

The Marvelle Koffler Breast Centre, Mount Sinai Hospital, Sinai Health, Toronto, ON, Canada

Seema Panchal

Todd Cancer Institute, Long Beach Memorial Hospital, Long Beach, CA, USA

Carey A. Cullinane

Department of Oncology, Texas Oncology-Baylor Charles A. Sammons Cancer Center, US Oncology Network, Dallas, TX, USA

Joanne L. Blum

Department of Medical Oncology, Dalhousie University, QEII-Bethune Building, 1276 South Park Street, Halifax, NS, B3H 2Y9, Canada

Daniel Rayson

Hospital de la Santa Creu i Sant Pau, Barcelona, Spain

Teresa Ramón y Cajal

Prentice Women’s Hospital, Northwestern University Feinberg School of Medicine, Chicago, IL, USA

Jeffrey Dungan

Clinic of Obstetrics and Gynecology, Department of Medicine and Surgery, University of Milan-Bicocca, Fondazione IRCCS San Gerardo, Monza, Italy

Robert Fruscio

Familial Cancer Unit, Veneto Institute of Oncology IOV IRCSS, 35128, Padova, Italy

Stefania Zovato

Department of Surgery, Beth Israel Deaconess Medical Center, Boston, MA, USA

Stephanie Cohen

Concept and design—KM, SN. Data accrual—TH, JG, JK, RK, PM, TP, AA, AE, BK, LB, NT, OO, DZ, CFS, WF, FC, SLN, CE, JL. Drafting of manuscript—KM, SN. Statistical analysis—PS, SN. Final approval of manuscript—all authors.