I will have to sit down and read this over the weekend. But I'm a bit put off by its focus on evolutionary origins. It's prevalence is circa 1% (claimed in art

I will have to sit down and read this over the weekend. But I'm a bit put off by its focus on evolutionary origins. It's prevalence is circa 1% (claimed in article at 0.76%), that's too rare to really gun for an evolutionary basis like you do for cystic fibrosis or sickle cell. Circa 1/30 carries the CF gene which shows Mendelian inheritance and so we week a evolutionary basis.