Impact of Preoperative Toxicological Screening on Perioperative Anesthetic Management and Short-Term Outcomes Following Metabolic and Bariatric Surgery: A Prospective Observational Study. - Hany M; Hozien AI; Mohamed Hussein HAS; El-Sayes I; Hashem EY; Elmongui E; El Shamarka A; El Ansari W (Obesity surgery, 2026)