You seem to be stuck on this point. We agree that going by the 2017 diagnostic criteria for hEDS people are only diagnosed at a rate of 1/3100 to 1/5000.

But I ask;

* What’s the prevalence of HSD?

* Is there a meaningful difference between hEDS and HSD, i.e. how does one tell them apart except by severity?

* And would a history of 1/150K (1960s) to 1/50K (1980s) to 1/15K (1990s) to 1/5K (2000s) not suggest a prior history of under diagnosis? How can you be so sure that this time they have it right?