“…Grade II concussion parameters described by the American Academy of Neurology (AAN) were detailed in seven articles [ 11 , 21 , 22 , 23 , 24 , 25 , 28 ] and seven articles used the latest Consensus Statement on Concussion in Sport (CsoCiS) [ 6 , 7 , 18 , 31 , 32 , 38 , 40 ]. One article used the Veteran Health Affairs/Department of Defence mTBI criteria for concussion diagnosis [ 36 ] and seven articles did not state the method of concussion diagnosis [ 13 , 15 , 20 , 33 , 39 , 41 ]. Concussions were diagnosed by certified athletic trainers and/or medical professionals in 17 articles [ 6 , 7 , 11 , 12 , 13 , 15 , 21 , 24 , 25 , 28 , 31 , 32 , 33 , 38 , 39 , 40 , 41 ]; however, the remaining six did not state who diagnosed the concussions of the participants [ 16 , 18 , 20 , 22 , 23 , 36 ].…”