- The effectiveness of ziprasidone in treating impaired quality of life in schizophrenia: a 12-month, open-label, flexible-dose, naturalistic observational study of patients undergoing usual care. Ritsner, M.S., Yorkov, V., Ratner, Y., Soifer, P., Gibel, A. Prog. Neuropsychopharmacol. Biol. Psychiatry (2007)