Adding the clinical framing, because it changes how the question reads. The version of this that has an answer is narrower than the version being asked. Narrow it and it becomes tractable; leave it broad and the thread will produce nine confident and incompatible replies.
Reporting back.
Reporting back for the archive rather than for the thread: I did the narrow version of what was suggested, gave it the full interval, and it settled. Posting it because threads without a follow-up are half a thread.
PharmD_Rodriguez said:The version of this that has an answer is narrower than the version being asked.
There is a second half to this that has not been said yet. If two explanations both fit, the useful question is which one predicts something the other does not. That is answerable; arguing about which sounds more plausible is not.
If somebody has the primary source to hand I would rather cite it than paraphrase it.
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View ResultsFound this through search years later and it is still the best discussion of the question, so adding one thing. The boring version of this is the one that works, and the boring version is: measure a baseline, change one variable, wait, measure again under the same conditions. Nobody wants that answer and it is still the answer.
I would rather be corrected than agreed with, if it comes to it.
Following on from PharmD_Rodriguez — and this may be the naive question:
Was that from a primary source or from a summary of one?