Original: Greyson wrote the overview of Near Death Experiences for the Encyclopædia Britannica and was the Editor-in-Chief of the Journal of Near-Death Studies (formerly Anabiosis) from 1982 through 2007.
Simplified: Greyson also wrote the overview of near death experiences for the Encyclopædia Britannica and was the Editor-in-Chief of the Journal of Near-Death Studies from 1982 through 2007.