Decot 2011.

Methods	Allocation: the study is described as double‐blind; no details about random sequence generation and allocation concealment procedure. Cross‐over design.
Participants	Diagnosis: schizophrenia. No details about the baseline clinical status.
Interventions	1. Standard antipsychotics 2. Placebo
Outcomes	Efficacy, analysis based on the COMT Val108/158Met polymorphism (no usable data reported).
Notes	The conference abstract did not report any usable data for outcomes of interest in this review. We tried to contact the trial Authors to ask for further data but did not receive any reply.