Funding for this research was provided by:
National Institute of Diabetes and Digestive and Kidney Diseases (U01-DK-098245, U34-DK-091958)
American Diabetes Association (1-14-D2d-01)
Received: 7 August 2017
Accepted: 10 April 2018
First Online: 3 May 2018
Ethics approval and consent to participate
: The study is approved and monitored by an independent data and safety monitoring board (appointed by the National Institute of Diabetes and Digestive and Kidney Diseases) and the institutional review board of each collaborating clinical research site. Written informed consent was obtained from each participant prior to study procedures.
: The authors declare that they have no competing interests.
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