Is There Any Evidence for the Use of Four for Potassium?

Early observational studies from the seventies and eighties are really the like, that's the genesis story of buffing to four. So is there any contemporary data in modern medical context that supports this goal of four for potassium? There certainly gies more recent whether or not it supports four is, i think, worthy of discussion. But probably that te the data i have seen that most supports four is for patients with heart failure. And here the outcomes are very similar.