Lefty

Would you mind linking to the exact SLK study you are referring to? It does not seem to be the metaanalysis one unless it is one of the underlaying studies not even done by SLK>
I've found about a dozen SLK studies, mostly relying upon now discredited Chinese studies , but I don't want to waste time beating a dead horse. If you do mean the trashy one that's in the paper, it will take some time to go through the footnotes to see what unreliable study they cited.
Thanks
Charm