title: Statistical heterogeneity and centre effects in clinical trials of alprazolam.
authors.forename: S B
authors.initials: SB
authors.lastname: Patten
authors.forename: G H
authors.initials: GH
authors.lastname: Fick
authors.forename: J V
authors.initials: JV
authors.lastname: Williams
mesh_terms: D000525:Alprazolam / Q000009:adverse effects / Q000627:therapeutic use*; D000929:Antidepressive Agents, Tricyclic / Q000009:adverse effects / Q000627:therapeutic use; D002986:Clinical Trials as Topic / Q000706:statistics & numerical data*; D003866:Depressive Disorder / Q000188:drug therapy* / Q000523:psychology; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D006801:Humans
chemical_list: D000929:Antidepressive Agents, Tricyclic; D000525:Alprazolam