In support of my statement, it is now noted that the lead professor's wife sent out misleading emails to find people who wanted to return to work, if they tested positive. The professor says he knew nothing of it and because they are wealthy they would skew low rather than high.

BuzzFeed News: A Stanford Professor’s Wife Recruited People For His Coronavirus Study By Claiming It Would Reveal If They Could “Return To Work Without Fear”. https://www.buzzfeednews.com/article/stephaniemlee/stanford-...