https://www.wired.co.uk/article/cold-trauma-suspended-animation
A great article written by Natalie Healey published on the wired.co.uk site, raises some interesting questions starting with the basis of the definition of death, through to possible roles for body cooling in the treatment of trauma particularly when trying to increase the odds of survival for patients who have bleed out half of their blood volume. The current survival rate for those patients is just 5%.
In the article the quote in the title of this post is attributed to a medical Doctor, Mads Gilbert when in 1999 they saved the life of a Swedish radiologist who fell through ice into a stream, drowned, had a body temperature of 13.7 degrees Celsius and was much later warmed and successfully resuscitated.