Funding for this research was provided by:
University of Pittsburgh Brain Institute (Seed Grant)
Walter L. Copeland Fund of the Pittsburgh Foundation for Cranial Research
Text and Data Mining valid from 2018-01-25
Received: 16 October 2017
Accepted: 16 January 2018
First Online: 25 January 2018
Compliance with ethical standards
: This research was funded by a Seed Grant from the University of Pittsburgh Brain Institute and was partly funded by the Walter L. Copeland Fund of the Pittsburgh Foundation for Cranial Research.
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. For this type of study formal consent is not required.
: For this type of retrospective study formal consent is not required.