Characteristics of excluded studies

Avci 2001
Reason for exclusion	Patients were not randomized
Brazitikos 2005
Reason for exclusion	Investigated tamponade agents after pars plana vitrectomy surgery
Gao 1993
Reason for exclusion	Case series
Hammer 1997
Reason for exclusion	Study reported only 180 days of follow-up
Hutchins 2003
Reason for exclusion	Case series
Krasnik 1999
Reason for exclusion	Not relevant to the review
Latecka-Krajewska 1998
Reason for exclusion	Not randomized
Li 1995
Reason for exclusion	Case series
Lu 2002
Reason for exclusion	Retrospective study
Pastor 1998
Reason for exclusion	Retrospective study
Pertile 1999
Reason for exclusion	Not relevant to the review
Peyman 1987
Reason for exclusion	Average follow-up 8.4 months
Soheilian 2006
Reason for exclusion	Retrospective study
Stefer 1991
Reason for exclusion	Case series
Tufail 1997
Reason for exclusion	Not relevant to the review
van Effenterre 1987
Reason for exclusion	Case series