Funding for this research was provided by:
National Cancer Institute (1R21CA179932-01A1)
Received: 10 October 2017
Accepted: 22 March 2018
First Online: 2 April 2018
Ethics approval and consent to participate
: Ethics approval was granted by the universities of the investigators involved in data collection including, The University of Melbourne Human Ethics Committee, Pontifica Universidade Catolica do Parana Research Ethics Committee, The Hong Kong Polytechnic University Human Ethics Committee of the Faculty of Health and Social Sciences, and Washington University in St. Louis Institutional Review Board (reference #201303108).Informed consent was obtained verbally from each participant over the telephone for participants from Australia, Brazil, and the United States, and in-person for participants from China. Documentation of verbal consent was waived by the aforementioned ethics committees.
: Not applicable.
: The authors declare that they have no competing interests.
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