| Recruiting | N/A | 210 | Europe | ANTIBIOTIC (METRONIDAZOLE AND CIPROFLOXACIN), CONTROL | Germans Trias i Pujol Hospital | Anal Fistula, Anal Abscess | 03/22 | 12/25 | | |
| Completed | N/A | 2000 | Europe | Elderly surgical patients | Germans Trias i Pujol Hospital | Surgery--Complications, Age Problem | 12/23 | 12/23 | | |