Study selection
The inclusion criteria were a) studies that evaluate the role of penicillin alone (or equivalent penicillin allergic) versus penicillin plus additional anaerobic cover in the management of peritonsillar abscess,  b)Randomized control trials, c)published in English language only. Studies that did not compare a penicillin alone (or equivalent penicillin allergic) versus penicillin plus additional anaerobic cover were excluded. Duplicate studies, reviews, comments, animal studies, letters to the editor and studies demonstrating high risk of bias on analysis were also excluded. Data extraction was performed by two authors (KP and CMM) independently.