Dr. Marc Siegel explains on 'Fox & Friends' how this happens, outlines warning signs.
Read also: Kris Kristofferson: An Outlaw at 80 http://www.rollingstone.com/music/features/kris-kristofferson-an-outlaw-at-80-20160606
Read also: 'There was a slow slipping away': Kris Kristofferson's wife says her husband 'suddenly came back' within weeks of Lyme disease treatment after being misdiagnosed with Alzheimer's http://www.dailymail.co.uk/news/article-3679426/Oh-god-s-Kris-Kristofferson-slipping-away-Alzheimer-s-misdiagnosis-wife-says-husband-returned-Lyme-disease-treatment.html
Read also: “A Slow Slipping Away”— Kris Kristofferson’s Long-Undiagnosed Battle with Lyme Disease http://www.huffingtonpost.com/entry/a-slow-slipping-away-kris-kristoffersons-long_us_577c047be4b00a3ae4ce6609
