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| Studies | Sim ± NAC group | No Sim ± NAC group | |||
|---|---|---|---|---|---|
| Total patients | Patients achieving adequate visibility | Total patients | Patients achieving adequate visibility | ||
| Ahsan et al. (32) | 90 | 27/90 | 83 | 48/83 | |
| Elvas et al. (33) | 199 | 1/199 (100%) | 98 | 4/98 (96%) | |
| Monrroy et al. (34) | 138 | 57/138 | 46 | 26/46 | |
Sim, Simethicone; NAC, N-acetyl cysteine.
