Is the incidence of psychotic disorder in decline? Epidemiological evidence from two decades of research

Kirkbride JB, Croudace T, Brewin J, Donoghue K, Mason P, Glazebrook C, Medley I, Harrison G, Cooper JE, Doody GA, Jones PB. Is the incidence of psychotic disorder in decline? Epidemiological evidence from two decades of research. Int J Epidemiol. 2009; 38(5): 1255-64.