TY - STAND AU - Y. Chen AU - S. Farooq AU - J. Edwards AU - C. Chew-Graham AU - D. Shiers AU - M. Frisher AU - R. Hayward AU - A. Sumathipala AU - K. Jordan BT - BMC Med DO - 10.1186/s12916-019-1462-y M1 - 1 PY - 2019 EP - 227 T2 - BMC Med TI - Patterns of symptoms before a diagnosis of first episode psychosis: a latent class analysis of UK primary care electronic health records VL - 17 SN - 1741-7015 ER -