Dr Alexander
Dr Eben Alexander is a Harvard-educated neurosurgeon.
Dr Alexander says that patients have spoken to him about out of body experiences.
Until 2008, Dr Alexander regarded these experiences as "wishful thinking"
In 2008, Dr Alexander was in a coma for seven days after getting meningitis.
The part of Dr Alexander's brain which controls human thought and emotion "shut down".
Dr Alexander then had an out of body experience.
Afterlife exists says top brain surgeon
In Newsweek, Dr Alexander says that, while he was in the coma, he was met by a beautiful blue-eyed woman in a "place of clouds, big fluffy pink-white ones" and "shimmering beings".
He writes: "Birds? Angels? These words registered later, when I was writing down my recollections. But neither of these words do justice to the beings themselves, which were quite simply different from anything I have known on this planet. They were more advanced. Higher forms..."
"A huge and booming like a glorious chant, came down from above, and I wondered if the winged beings were producing it. The sound was palpable and almost material, like a rain that you can feel on your skin but doesn't get you wet...
"I know full well how extraordinary, how frankly unbelievable, all this sounds. Had someone even a doctor told me a story like this in the old days, I would have been quite certain that they were under the spell of some delusion.
"But what happened to me was, far from being delusional, as real or more real than any event in my life. That includes my wedding day and the birth of my two sons...
"I've spent decades as a neurosurgeon at some of the most prestigious medical institutions in our country. I know that many of my peers hold as I myself did to the theory that the brain, and in particular the cortex, generates consciousness and that we live in a universe devoid of any kind of emotion, much less the unconditional love that I now know God and the universe have toward us.
"But that belief, that theory, now lies broken at our feet. What happened to me destroyed it."
'Door to the afterlife' found