Its not difficult to come up with mechanisms like that, not even difficult to come up with the idea and then get some evidence consistent with it. The key is to

Its not difficult to come up with mechanisms like that, not even difficult to come up with the idea and then get some evidence consistent with it. The key is to make sure everything works out quantitatively: https://www.ncbi.nlm.nih.gov/pubmed/12242150 https://www.ncbi.nlm.nih.gov/pubmed/12242150