About the Authors

Margaret Urban

margaret.urban@nhls.ac.za

Affiliations NHLS/MRC Cancer Epidemiology Research Group, National Health Laboratory Services, Johannesburg, South Africa, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa

Emily Banks

Affiliations National Centre for Epidemiology and Population Health, The Australian National University, Canberra, Australia, The Sax Institute, Sydney, Australia

Sam Egger

Affiliation Cancer Council New South Wales, Sydney, Australia

Karen Canfell

Affiliations Cancer Council New South Wales, Sydney, Australia, Sydney Medical School—Public Health, University of Sydney, Sydney, Australia

Dianne O'Connell

Affiliations Cancer Council New South Wales, Sydney, Australia, Sydney Medical School—Public Health, University of Sydney, Sydney, Australia, School of Public Health and Community Medicine, University of New South Wales, Sydney, Australia, School of Medicine and Public Health, University of Newcastle, Newcastle, Australia

Valerie Beral

Affiliation Cancer Epidemiology Unit, University of Oxford, Oxford, United Kingdom

Freddy Sitas

Affiliations Cancer Council New South Wales, Sydney, Australia, Sydney Medical School—Public Health, University of Sydney, Sydney, Australia, School of Public Health and Community Medicine, University of New South Wales, Sydney, Australia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: FS VB MU. Analyzed the data: SE. Wrote the first draft of the manuscript: EB SE VB. Contributed to the writing of the manuscript: MU FS DO'C KC. ICMJE criteria for authorship read and met: MU EB SE VB FS DO'C KC. Agree with manuscript results and conclusions: MU EB SE VB FS DO'C KC. Enrolled patients: MU FS. Statistical advice: DO'C.