Barbier, E
Johnstone, A L
Khomtchouk, B B
Tapocik, J D
Pitcairn, C
Rehman, F
Augier, E
Borich, A
Schank, J R
Rienas, C A
Van Booven, D J
Sun, H
Nätt, D
Wahlestedt, C
Heilig, M
Article History
Received: 4 August 2015
Revised: 20 May 2016
Accepted: 1 June 2016
First Online: 30 August 2016
Competing interests
: The authors declare that, except for income received from our primary employer, no financial support or compensation has been received from any individual or corporate entity over the past 3 years for research or professional service, and there are no personal financial holdings that could be perceived as constituting a potential conflict of interest.