@taoeffect Sorry just saw this.
Ya, I don't have reason to doubt that ordering at least doesn't move the results much, and as a population study, it's pretty definitive that there's awful bias.
But it's frustrating that people (including the authors) present it as a good way to measure *your personal N=1 bias*, which, if your experience generalizes, it isn't.
(In general, population results are useful—"% risk of cancer"—but most people want a personalized answer—"MY risk of cancer".)