Functional polymorphisms in the COMT gene are associated with dopamine and norepinephrine-dependent neuropsychiatric disorders such as schizophrenia [3], [4], bipolar disorder [5], obsessive compulsive disorder [6], [7], anxiety disorders [8]–[10], attention deficit hyperactivity disorder [11], [12], addiction [13], and anorexia nervosa [14], [15] as well as neurodegenerative disorders such as Parkinson's disease [16], [17]. Here, COMT is linked to schizophrenia.