and antidepressant response,13 as well as others outlined in a recently published review by the European Group for the Study of Resistant Depression (GSRD).14 Similar studies were conducted to investigate adverse effects, where an association between a common serotonin transporter polymorphism and antidepressant-induced mania was described.15 Additionally, a significant concordance among first-degree relatives for antipsychotic-induced tardive dyskinesia was described by Müller et al.16 and antipsychotic-induced weight gain by Gebhardt et al.17
