Sports-related concussion: ongoing debate. Issue 2 (15th March 2013) - Slobounov, Semyon; Bazarian, Jeff; Bigler, Erin; Cantu, Robert; Hallett, Mark; Harbaugh, Robert; Hovda, David; Mayer, Andrew R; Nuwer, Marc R; Kou, Zhifeng; Lazzarino, Giuseppe; Papa, Linda; et al.