Funding for this research was provided by:
Division of Cancer Epidemiology and Genetics, National Cancer Institute
Received: 3 March 2020
Accepted: 21 July 2020
First Online: 17 September 2020
Ethics approval and consent to participate
: The NIH–AARP Study was approved by the Special Studies Institutional Review Board of the National Cancer Institute, and all participants gave written informed consent by completing and returning the questionnaire.
: Not applicable