actually..I was not sure
Posted on: May 4, 2021 at 10:44:21 CT
meatiger MU
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they were not controlled per se (everyone knew what treatment they were on)...and were not blind either. And in many of the trials it only took account to what they did at work, not the rest of the time off work. There was also no idea as to what exposure level they had (both at work and off work).