- “In another series of conferences held in 2006 and 2007, we learned even more. Doctors concluded that three concussions appeared to be a marker for exponentially higher rates of ALS, Parkinson’s disease, Alzheimer’s disease, premature senility, dementia, and depression. Their research uncovered a condition called chronic traumatic encephalopathy, which stems from concussions and can lead to depression and suicide. I called these developments “a ticking time bomb” and an “undiagnosed health epidemic” and predicted we would have an outbreak of symptoms that would be unprecedented.” The Agent: My 40-Year Career Making Deals and Changing the Game (Steinberg, Leigh;Arkush, Michael)–page 202