There was an item in the news that military docs are proposing a form of oxygen therapy for troops suffering from head wounds. Oxygen in the blood does promote healing (I’m no doc, so I’m just taking their word for this), so putting folks in an oxygen only environment, perhaps under pressure, will put more oxygen in the blood. I’m glad to see that we’re continuing to look for ways to heal our wounded warriros. The article didn’t mention it, but I assume that all the troops participating in the test will we volunteers.