According to “Bill Murray used hypnosis to treat cat allergy,” Daily Dish, Oct. 23, 2014 …

“He told comedienne Ellen DeGeneres in an interview on her talk show on Wednesday, ‘I read someplace that allergies are psychosomatic and you can actually hypnotize yourself and overcome the allergy.

“‘So I used to do that. I used to go to girls’ houses and they had cats and all of a sudden I’d be looking at them crying and they’d be like, “What did I say?” and I’d go, “No, it’s not you!” So I learned to hypnotize myself and get over it.

“‘But then I decided I didn’t really like cats that much, so I stopped. I’m more of a dog guy. But for the movie I went back to that and it worked.’”

“The epithelial cells that line the surface of the gut have a rough life and are known by other methods to last only five days. Ignoring these surface cells, the average age of those in the main body of the gut is 15.9 years, Dr. [Jonas] Frisen found.”

http://www.nytimes.com/2005/08/02/science/02cell.html?pagewanted=all&_r=0

“A 25-year-old heart replaces about 1% of all cardiomyocytes over a year; a 75-year-old about half that.”

http://www.nature.com/news/2009/090402/full/news.2009.232.html