No doubt, research paid for with a government grant.
I solidly blame state professional licensing boards for this... Medical Doctors are involved... and deserve to be stripped of their licenses.
A scientist during the ‘00s requested to use that data, since there was no other practical way to replicate the results.
The hue and cry from the left and the right slowed it down, but I believe that the data was eventually used.
Here we have a deliberate use of humans for unapproved science, and the left and the gov’t hides it.