Campbell M, Friedman E, Green W H, Collins P J, Small A M, Breuer H
Int Pharmacopsychiatry. 1975;10(4):213-21. doi: 10.1159/000468197.
Blood serotonin levels were measured in schizophrenic children, all of whom showed manifestations of illness in the first 2 years of life, and controls. Serotonin levels were higher in patients (mean = 0.267 mug/ml) than in controls (mean = 0.218 mug/ml), although the difference did not reach statistical significance. Serotonin levels were significantly higher in patients with florid psychosis and those with lower IQs than in patients in remission or partial remission or higher IQs.
对患有精神分裂症的儿童及其对照组进行了血液血清素水平的测量。所有精神分裂症儿童在生命的头两年均表现出疾病症状。患者的血清素水平（平均 = 0.267微克/毫升）高于对照组（平均 = 0.218微克/毫升），尽管差异未达到统计学显著性。与处于缓解期或部分缓解期的患者或智商较高的患者相比，患有明显精神病症状的患者和智商较低的患者的血清素水平显著更高。
