Comment by dgfl

For example this one:

https://doi.org/10.1093/ije/dyp166

It’s a decently big meta-review. It cites studies which more or less say exactly what I said very early, e.g. https://doi.org/10.1007/BF02071515

I might be completely wrong, of course. I’d rather be proven wrong than stay ignorant, so please do share the studies you had in mind.