Efficacy and extrapyramidal side-effects of the new antipsychotics olanzapine, quetiapine, risperidone, and sertindole compared to conventional antipsychotics and placebo - Leucht, S; Pitschel-Walz, G; Abraham, D; Kissling, W (A meta-analysis of randomized controlled trials. Schizophr Res, 1999)