for some people listening especially if you haven't heard this, we breathing oxygen and breathe out carbon dioxide in one downside was accessed inhalation of carbon dioxide with a mask. the study was retracted from what i read, it doesn't appear to happen retracted for scientific reasons, you know anything about that? >> i looked into it and paternal claims the calibration device that measures co2 wasn't properly calibrated. then redo the study. the authors told me the retracted article they were never given a good reason and think ask for additional review done that resulted in the retraction and the journal didn't share with the authors despite multiple requests. this is unheard of in medicine and for all the money we spent in all the money the nih that