© 2013 Gagnon, Rintamäki, Gagnon, Cheung, Herzig, Porvari and Kyröläinen. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc. The article was first published by Frontiers. Reproduced here with permission.
Except where otherwise noted, this item's license is described as © 2013 Gagnon, Rintamäki, Gagnon, Cheung, Herzig, Porvari and Kyröläinen. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc. The article was first published by Frontiers. Reproduced here with permission.