Study	Reason for exclusion
Ariza 1991	Only one group was allowed to receive other antibiotics in addition to the randomised treatment.
Badawy 2013	Randomisation was performed after matching to similar patients; the allocation of the second person can be predicted with 100% accuracy.
Felisart 1985	It includes infections other than SBP and no separate data are available.
Grange 2004	It includes infections other than SBP and no separate data are available.
Lim 2011	This is a review.
Liu 2000	This is not a randomised clinical trial.
McCue 1981	This is a review.
Piano 2011	This is a review.
Ricart 2000	It includes infections other than SBP and no separate data are available.
Rimola 1984	This is not a randomised clinical trial.
Taskiran 2004	This is not a randomised clinical trial.

SBP: spontaneous bacterial peritonitis