Editor’s note: This story includes discussion of suicide. If you or someone you know needs help, the national suicide and crisis lifeline in the U.S. is available by calling or texting 988. There is also an online chat at 988lifeline.org. Internationally, find a suicide prevention helpline at findahelpline.com Repeated blows to the head during professional American football may come with a lasting cost to brain health, including higher death rat…