The word "substantial" is very vague and a bad sign for any scientific and evidence-based publication.

Then, when such news show up while Trump is trying to make his deal with the Chinese and (it seems) even got a hostage recently, this makes me feel a bit suspicious of this article, especially since its content is pay-walled.

(I'm not defending organ-harvesting, which was already reported in the past, but the article must be specific about what has or has not happened, and should not use such vague statements.)