Jazzy,
I know articles similar, and have been in similar situations as you.
Have found articles of interest like that one, and have remembered to go back because I forgot to bookmark it and could not find it again. That is one reason I am forever online re - searching tbi, mtbi, Brain injury, concussion, pcs, etc.
I dig and dig into anything from NIH, BMJ, and anywhere else I might find bibliographies for information.
Docs on my side of the fence agree that my history is full of the Multiple Injury Syndrome picture, as why my issues are dragging along as long as they are at my age, but the Insurance folks don't want to believe there is even one concussion/pcs issue here...
I feel for all folks facing Multiple Injury issues.....
Best wishes..............