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max - where is the link to the studies? I am trying to weed through the tons of material online to find real studies regarding mask-wearing by physicians and so I am asking you instead...

Preliminary Report on Surgical Mask Induced Deoxygenation During Major Surgery:
http://scielo.isciii.es/pdf/neuro/v19n2/3.pdf

I will post about the results of my query to the local health food chain - if/when I get a response. Thank you so much for this!

thank you so much!