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Keywords: Multicenter trial
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International Pharmacopsychiatry (1976) 11 (2): 74–83.
Published Online: 11 August 2017
..., assessed by investigators from different areas and with different cultural, and clinical backgrounds. In a multicenter trial (sulpiride versus haloperidol) PDA offered a chance to re-examine and analyze the characteristics of each patient and therefore to control the criteria followed for the sample...