| Study | Reason for exclusion |
|---|---|
| Duvanel 1986 | This was a retrospective cohort study (Table 2) |
| Ferrieri 1973 | Participants were children (ages 1 to 14) |
| Fritz 2011 | The study mainly investigated recurrent purulent abscesses in children |
| Haustein 1989 | This was a retrospective cohort study |
| Klempner 1988 | This study investigated prophylaxis for recurrent skin abscesses |
| Maddox 1985 | Participants were children (ages 2 to 5) |
| Raz 1996 | This study investigated prophylaxis for recurrent furunculosis and folliculitis (Table 2) |
| Wang 1997 | This was a non‐randomised study |
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