I agree. There will be plenty of victim-blaming going on here if people read too much into the epidemiology. Thinking about the implications of your comment fo

I agree. There will be plenty of victim-blaming going on here if people read too much into the epidemiology. Thinking about the implications of your comment for my suggestion of a clinical trial, I realized the following: powering a clinical trial to detect any change in the incidence of such a rare disorder is going to require tens or perhaps hundreds of thousands of participants. This sounds absurd but may actually be possible, given how much interest there is in vitamin D lately (faddist, IMHO, but whatever). Possible because (1) social interest; (2) vitamin D is cheap; (3) vitamin D is likely relatively safe at typical doses.