Please support that statement with some facts. Or do you believe that scientific studies for US based companies are not internationally done and accepted?
The Food and Drug Administration (FDA) may accept clinical studies conducted outside the United States in support of safety and efficacy claims for drugs, biological products and medical devices.
Also note that the Chinese MANF study was published in:
Why isn't it? What's the connection? Because it's CHINA!? Every major pharmaceutical company has locations there, along with research and development centers. I spent over a decade there, several of those years doing market research for many of these major pharmaceutical companies. Much of the literature/data findings on MANF were done by Chinese scientists. My guess the same scientists that performed these latest studies were the same scientists that did them before... what's the big deal?