Melvin Morse did. He wrote wonderful books on the subject. I hope everybody checks them out.
Closer To The Light (Learning for Near Death Experiences of Children)
Transformed By The Light
Where God lives.
A pretty unbiased research on the subject. Wonderful read
Near Death Experiences are real. I have my own personal experience when I had sudden cardiac attack...which becomes sudden cardiac death unless someone immediately takes action to keep you alive!