Kirkbride, JB;    Hameed, Y;    Wright, L;    Russell, K;    Knight, C;    Perez, J;    Jones, PB;      (2017)    Waiting time variation in Early Intervention Psychosis services: longitudinal evidence from the SEPEA naturalistic cohort study.                   Social Psychiatry and Psychiatric Epidemiology , 52  (5)   pp. 563-574.    10.1007/s00127-017-1343-7 <https://doi.org/10.1007/s00127-017-1343-7>.       Green open access