The link to the actual free to access study is always at the bottom of the Medical Xpress page, immediately below the writeup.
Thanks for pointing that out.
I looked for data graphing respiratory rate and EtCO2, but I didn’t see it. I think that would have been much more helpful to describe a subject’s hyperventilation, rather than just depending on EtCO2 < 35; the respiratory rate data should have been very easy to include while monitoring EtCO2. It seems conspicuously absent.