Global 30-day morbidity and mortality of surgery for perforated peptic ulcer: GRACE study. - Abouelazayem M; Jain R; Wilson MSJ; Martinino A; Balasubaramaniam V; Biffl W; Coccolini F; Riera M; Wadhawan H; Wazir I; Abderaouf B; Abramov D; et al. (Surgical endoscopy, 2024)