Good to see this initiative. I do hope they have the breath of vision to ask the simple question…’Do you feel any pain whilst asleep ?’ , and follow the responses to the logical conclusion that there may be no requirement for pain sensations in the sleep state. For me, that’s an essential key to unravelling the enigma of the pain experience, and its relationship with consciousness. Good luck with their efforts…..this is one study I’ll be watching with interest.