Causes and consequences of the gender difference in age at onset of shizophrenia - Häfner, Heinz; Heiden, Wolffram an der; Behrens, St; Gattaz, Wagner Farid; Hambrecht, Martin; Löffler, Walter; Maurer, K; Munk-Jorgensen, P; Nowotny, Birgit; Riecher-Rössler, A; Stein, A (Social and Clinical Psychiatry, 1999)