> [...] However, the trial was only able to enroll participants on small stationary aircraft on the ground, suggesting cautious extrapolation to high altitude

> [...] However, the trial was only able to enroll participants on small stationary aircraft on the ground, suggesting cautious extrapolation to high altitude jumps. I'm surprised they were permitted to use human participants for this in the first place. Should have been done in mice and on the floor of a lab, as a first pass.