Funding for this research was provided by:
National Institute on Aging (P50 AG05138)
Received: 22 December 2017
Accepted: 27 May 2018
First Online: 26 June 2018
Ethics approval and consent to participate
: Prior to their participation, all donors of skin biopsies provided their written informed consent and study approval was obtained from Western Institutional Review Board.
: All authors declare their consent for publication of this manuscript.
: The authors declare that they have no competing interests.
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