Thanks for the reply, and for responding so considerately to criticism! I think it’s a worthwhile data gathering activity, and personally would be very interested in more detailed, scientific, controlled and correlated data in this area, and I think there is LOTS of room in the domain for real research if you were thinking of doing it more.

Unfortunately, almost all data I’ve seen on this domain has very similar oversight or gaps and it makes it difficult to create actionable policy or even opinions without further research.

I wish you and your university well!