Funding for this research was provided by:
National Natural Science Foundation of China (81530088)
Ministry of Science and Technology of the People's Republic of China (2011BAI09B01)
Breast Cancer Research Foundation
National Key Research and Development Program of China (2016YFC0900504, 2016YFC0900500, 2016YFC0900501, 2016YFC1303904)
UK Wellcome Trust (088158/Z/09/Z, 202922/Z/16/Z, 104085/Z/14/Z)
Received: 9 July 2019
Accepted: 13 November 2019
First Online: 21 November 2019
Compliance with ethical standards
: We declare that we have no conflicts of interest.
: The Ethical Review Committee of the Chinese Center for Disease Control and Prevention (Beijing, China) and the Oxford Tropical Research Ethics Committee, University of Oxford (UK) approved the study.
: Informed consent was obtained from all individual participants included in the study.
: Details of how to access China Kadoorie Biobank data and details of the data release schedule are available from www.ckbiobank.org/site/Data+Access. The lead author affirms that the manuscript is an honest, accurate, and transparent account of the study being reported; that no important aspects of the study have been omitted; and that any discrepancies from the study as planned have been explained.