Received: 11 October 2019
Revised: 29 December 2019
Accepted: 9 March 2020
First Online: 3 April 2020
Ethics approval and consent to participate
: The study was approved by the Special Studies Institutional Review Board of the US National Cancer Institute (NCI). Original consent from participants was obtained from investigators for the NIH-AARP Diet and Health Study at enrolment. No new data collection or participant contact occurred for the purposes of this study.
: Not applicable. No individual-level data are included in this paper.
: The data that support the findings of this study are available from the NIH-AARP Diet and Health Study. Restrictions apply to the availability of these data, which were used under license for this study. Data are available with the permission of the NIH AARP.
: The authors declare no competing interests.
: Research reported in this publication was supported by the Agency for Healthcare Research (AHRQ) and Quality and Patient-Centered Outcomes Research Institute (PCORI) under Award Number K12 HS026395, awarded to SCS. The content is solely the responsibility of the listed authors and does not necessarily represent the official views of AHRQ or PCORI.