https://link.springer.com/article/10.1007/s40519-020-00978-5
Here in a study in Lebanon, the candidate gene for P trait showed association with anorexia nervosa. The non A- trait candidate gene showed suggestive association with anorexia nervosa.
We had noted an association with N trait in observation of patients with anorexia nervosa, but one can see why P trait could predispose as well to extreme "picky eating" .
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