Hefferman, Gerald M.
Swenson, David W.
Ayyala, Rama S.
Murphy, Brian
Johnson, Michele
Jindal, Gaurav
Article History
Received: 7 December 2018
Accepted: 11 January 2019
First Online: 25 January 2019
Compliance with ethical standards
: Internal review board approval was waived because this study was conducted exclusively using publicly available website data and prior published research.
: The authors declare that they have no conflict of interest.