| Hi Glovepuppet,
As a DAN member I get their quarterly magazine. It often contains articles about ongoing medical research in diving. In the back of my mind I seem to remember an article which touched on this subject.
I don't keep old issue so I can't check back. It might be worth joining/contacting DAN. Perhaps some YD contributers have better memories than me (for sure!) and even have back issues.
Very best wishes
Paul |