Previous studies that suggested such a connection were often poorly designed, had dropout rates or did not control for factors that could affect the conclusion.
There are bans on this practice in operation around the world, but Fordham said the coverage is patchy and, in any case, enforcing the bans is difficult due to a lack of policing on the high seas.
The goal isn't data completeness, it's data usefulness - just enough to enable boring stuff like alarm clocks, refrigerators, vacuum cleaners and washing machines.
According to compound materials' principle, it may be the basic way to use the new material technology and the method to make the varnish film and the flan integrity match each other.