All patient samples were obtained from the Coriell collection. Patients were selected based on the high likelihood of a genetic component to disease. Patient 1 (GM02038, male, 22 years of age, Caucasian) was diagnosed with SCZD at six years of age and committed suicide at 22 years of age. Patient 2 (GM01792, male, 26 years of age, Jewish Caucasian) displayed episodes of agitation, delusions of persecution, and fear of assassination. His sister, patient 3 (GM01835, female, 27 years of age, Jewish Caucasian) had a history of schizoaffective disorder and drug abuse. Patient 4 (GM02497, male, 23 years of age, Jewish Caucasian) was diagnosed with SCZD at age 15 and showed symptoms including paralogical thinking, affective shielding, splitting of affect from content, and suspiciousness. His sister, patient 5 (GM02503, female, 27 years of age, Jewish Caucasian) was diagnosed with anorexia nervosa in adolescence and with schizoid personality disorder (SPD) as an adult. SPD has an increased prevalence in families with SCZD but is a milder diagnosis characterized not by psychosis but rather by a lack of interest in social relationships and
