“…On the other hand, several authors argue that there is solid empirical evidence supporting the notion that AN should be considered a distinct and separate phenotype (Birmingham, Touyz, & Harbottle, 2009;Bulik et al, 2007;Clinton, Button, Norring, & Palmer, 2004;Collier & Treasure, 2004;van Son et al, 2010). The differentiation between AN and other eating disorders is based upon recent evidence including genetics, epidemiology, response to psychotropic drugs and neuroimaging (for a review, see for example Birmingham et al, 2009.…”