It is difficult to maintain healthy neurons for three months of differentiation and some cultures invariably fail or become contaminated. When even one SCZD patient neural culture failed, the experiments were abandoned as all assays were conducted on neurons cultured in parallel. If, however, only a control neural culture failed, and at least three control samples remained, analysis was completed. For this reason, though patients are consistently numbered throughout the manuscript, controls are not, and are instead listed in numerical order (BJ, GM02937, GM03651, GM04506, AG09319, AG09429).
