Thank you, NF52. Very useful information, especially about the research. Didn't know that people playing contact sports have a higher risk. I was in coma for two weeks after concussion from a car accident in my childhood.

Thank you, NF52 and Samantha! I should have thanked you a long time ago! Lame excuse: A short time later, I talked to my doctor and told him about my e4/e2 status. Not to worry, he said. He was e4/e3 himself (in his fifties, I guess) and was not at all worried (so I should not be, either.) So, I was...

Will it be available later?

Thank you for a great web site! I am a 77 years old e4/e2, and I have been lurking here and reading the startup pages. Today I saw a paper: https://www.sciencedaily.com/releases/2017/10/171010133917.htm or more detailed: https://www.psychiatrist.com/JCP/article/Pages/2017/v78n08/16m11367.aspx that i...