ATP7B and Wilson disease: There is only one study from 2001 by Portal et al. in which the authors analyzed 25 patients with WD using the Karolinska scales of personality (KSP) and the comprehensive psychopathological rating scale (CPRS) and found that patients homozygous for the Trp779Stop mutation in the ATP7B gene had the highest scores on the psychopathy scale compared to conformity and the socialization scale and low scores on the impulsivity, avoidance, and detachment scales.