Study	Reason for exclusion
Baloescu 2006	Allocation: not randomised, controlled ‐ trial.
Beuzen 2005	Allocation: randomised. Blindness: open‐label.
Fleischhacker 2005	Allocation: randomised Blindness: open‐label.
Giudicelli 1999	Allocation: randomised. Participants: people with schizophrenia. Interventions: inappropriate intervention.
Kelemen 2006	Allocation: not randomised, controlled ‐ trial.
Moritz 2002	Allocation: not randomised, case series.
Möller 1997	Allocation: randomised. Blindness: open‐label.
Oliveira‐Castro 1991	Allocation: not randomised, controlled trial. Blindness: open‐label.
Olié 2001	Allocation: not randomised, review.
Rettenbacher 2004	Allocation: not randomised, controlled trial.
Ryu 2006	Allocation: not randomised, controlled trial.
Yagdiran 2000	Allocation: not randomised, controlled trial.