Funding for this research was provided by:
National Center for Medical Rehabilitation Research (R01 HD30880; P2C HD050924)
National Institute of Diabetes and Digestive and Kidney Diseases (R01 DK104371)
NIH Fogarty (D43 TW009077)
Received: 27 June 2018
Accepted: 21 May 2019
First Online: 30 May 2019
Ethics approval and consent to participate
: We obtained written informed consent, and this study was approved by the Ethical Standards Committee of the University of North Carolina at Chapel Hill (Approval Number: 07–1963).
: Not applicable.
: The authors declare that they have no competing interests.