| Study | Reason for exclusion |
|---|---|
| Brown 2001 | Insufficient follow‐up period |
| Ho 2000 | Insufficient follow‐up period |
| Ho 2006 | Insufficient follow‐up period |
| Khalil 2000 | Circular stapling device not used. Investigators utilized linear stapling device to staple hemorrhoid pedicles. |
| Khan 2009 | Insufficient follow‐up period |
| Kraemer 2005 | Insufficient follow‐up period |
| Krska 2003 | Insufficient follow‐up period |
| Lau 2004 | Insufficient follow‐up period |
| Pavlidis 2001 | Insufficient follow‐up period |
| Wilson 2002 | Insufficient follow‐up period |
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