“…In their study, maternal small cell lung cancer was found to be positively related to the onset of schizophrenia in the offspring, but the finding was explained by parental smoking, a well‐recognized risk factor for mental health (Benros, Laursen, Dalton, Nordentoft, & Mortensen, ). Similarly, a nationwide Finnish birth cohort study did not find an association between parental cancer and psychosis in the offspring followed up to age 21 (Niemela et al, ). However, in a study with a rather small sample of adult patients with non‐affective psychosis (34 cases, 52 controls), a statistically significant association was observed between a parental history of type 2 diabetes and offspring psychosis (Fernandez‐Egea, Miller, Bernardo, Donner, & Kirkpatrick, ).…”