Paywalled but the study was done in a "large metropolitan area in Florida" and a "small community in Lithuania". It's good that they tested in two places that

Paywalled but the study was done in a "large metropolitan area in Florida" and a "small community in Lithuania". It's good that they tested in two places that are far apart, but it would be interesting to see how things vary by school and over time. When does it get better or worse?