Chen, Y., Farooq, S., Edwards, J., Chew-Graham, C. A., Shiers, D., Frisher, M., …Jordan, K. P. (2019). Patterns of symptoms before a diagnosis of first episode psychosis: a latent class analysis of UK primary care electronic health records. BMC Medicine, 17, Article 227. https://doi.org/10.1186/s12916-019-1462-y