Zachary Smith, DO, MSc

Publications

• Incidence, Risk Factors, and Outcomes of Post-endoscopic Retrograde Cholangiopancreatography Cholangitis: An International Multicenter Prospective Study.

  (Gupta M, Fazal MA, Hammal J, Khan R, Forbes N, CReATE Working Group.) Clin Gastroenterol Hepatol. 2026 Mar;24(3):851-853 PMID: 40716626 SCOPUS ID: 2-s2.0-105014598584 07/29/2025

• Uncomplicated Choledocholithiasis in Elderly Patients: A Target Trial Emulation Comparing Observation and ERCP (CHOIcE).

  (Smith ZL, Amjad T, Hoard M, Thorgerson A, Chisholm PR, Dua KS, Elmunzer BJ, Forbes N, Madhavan S, Keswani RN, Peller MT, Wani S, Zia H, Dawson AZ, Yu D.) Clin Gastroenterol Hepatol. 2026 Feb 17 PMID: 41713828 02/20/2026

• Endoscopic palliation of malignant gastric outlet obstruction: harmonising outcomes.

  (Smith ZL.) Lancet Gastroenterol Hepatol. 2026 Feb;11(2):95-96 PMID: 41512885 SCOPUS ID: 2-s2.0-105026725535 01/10/2026

• Adverse events of cold snare compared with hot snare and ablation endoscopic mucosal resection for large colorectal polyps.

  (Medawar E, Pohl H, Rex DK, Levenick JM, Pleskow DK, Khashab MA, Moyer M, Yang D, Melson J, Wallace MB, Mosko JD, Shahidi NC, Singh A, Gavric A, Djinbachian R, Gordon SR, Ngamruengphong S, Taunk P, Barber J, Piraka C, Elmunzer BJ, Aslanian HR, Elatrache M, Zolotarevsky E, Rastogi A, von Renteln D, Additional members of the Large Polyp Study Consortium.) Endoscopy. 2026 Feb;58(2):163-173 PMID: 40719106 07/28/2025

• Cold snare endoscopic resection for large colon polyps: a randomised trial.

  (Pohl H, Rex DK, Barber J, Moyer MT, Elmunzer BJ, Rastogi A, Gordon SR, Zolotarevsky E, Levenick JM, Aslanian HR, Elatrache M, von Renteln D, Wallace MB, Brahmbhatt B, Keswani RN, Kumta NA, Pleskow DK, Smith ZL, Abu Ghanimeh MK, Simmer S, Sanaei O, Mackenzie TA, Piraka C.) Gut. 2025 Oct 08;74(11):1804-1813 PMID: 40393701 PMCID: PMC12925415 SCOPUS ID: 2-s2.0-105005628880 05/21/2025

• Of Endpoints and Equipoise: Reforming Clinical Trials in Colorectal Polyp Resection.

  (Smith ZL, Forbes N, Madhavan S, Pohl H, Schauer JM, Steinbrück I, von Renteln D.) Curr Gastroenterol Rep. 2025 Sep 18;27(1):62 PMID: 40965773 SCOPUS ID: 2-s2.0-105016592118 09/18/2025

• Thirty-day hospital admission following high-risk outpatient ERCP: incidence and analysis of risk factors based on a secondary analysis of the Stent Versus Indomethacin trial dataset.

  (Yachimski P, Zhang J, Coté GA, Edmundowicz SA, Wani S, Shah R, Bang JY, Varadarajulu S, Singh VK, Khashab M, Kwon RS, Scheiman JM, Willingham FF, Keilin SA, Papachristou GI, Chak A, Slivka A, Mullady D, Kushnir V, Buxbaum J, Keswani R, Gardner TB, Forbes N, Rastogi A, Ross A, Law J, Chen YI, Barkun A, Smith ZL, Serrano J, Petersen B, Wang AY, Saltzman JR, Spitzer RL, Ordiah C, Spino C, Foster LD, Durkalski-Mauldin V, Elmunzer BJ, SVI Study Group.) Gastrointest Endosc. 2025 Sep;102(3):375-381.e1 PMID: 39914634 SCOPUS ID: 2-s2.0-86000360999 02/07/2025

• Adverse events, success, and tolerability of biliary endoscopic retrograde cholangiopancreatography with conscious sedation vs anaesthesia: a multi-centre prospective study.

  (Smith ZL, Kayal A, Ruan Y, Lethebe BC, Siersema PD, Padrón AT, Alshammari Y, Samnani S, Koury HF, Chau M, Howarth M, Cartwright S, Brenner DR, Tavakkoli A, Keswani RN, Elmunzer BJ, Wani S, Forbes N, CReATE Working Group.) J Can Assoc Gastroenterol. 2025 Apr;8(2):63-70 PMID: 40224576 PMCID: PMC11991873 04/14/2025

• Internal Validation is Imperative for Comparative Observational Studies Using TriNetX Cohort Level Data.

  (Smith ZL.) Am J Gastroenterol. 2025 Mar 04;120(9):2204-2205 PMID: 40029061 SCOPUS ID: 2-s2.0-105000890965 03/03/2025

• Adverse Events Associated With Endoscopic Retrograde Cholangiopancreatography: Systematic Review and Meta-Analysis.

  (Bishay K, Meng ZW, Khan R, Gupta M, Ruan Y, Vaska M, Iannuzzi J, O'Sullivan DE, Mah B, Partridge ACR, Henderson AM, Guo H, Samnani S, DeMarco M, Yuan Y, Elmunzer BJ, Keswani RN, Wani S, Smith ZL, Bridges RJ, Heitman SJ, Hilsden RJ, Brenner DR, Leontiadis GI, Forbes N.) Gastroenterology. 2025 Mar;168(3):568-586 PMID: 39515394 SCOPUS ID: 2-s2.0-85211230172 11/13/2024

• Adverse events, success, and tolerability of biliary endoscopic retrograde cholangiopancreatography with conscious sedation vs anaesthesia: a multi-centre prospective study

  (Smith ZL, Kayal A, Ruan Y, Lethebe BC, Siersema PD, Padrón AT, Alshammari Y, Samnani S, Koury HF, Chau M, Howarth M, Cartwright S, Brenner DR, Tavakkoli A, Keswani RN, Elmunzer BJ, Wani S, Forbes N, Chen YI, Barkun AN, Singh A, Hookey L, Arya N, Calo NC, Grover SC, Lei Y, Li S, Mohamed R, Turbide C, Bishay K, Gonzalez-Moreno E, Meng ZW, Heitman SJ.) Journal of the Canadian Association of Gastroenterology. 1 April 2025;8(2):63-70 SCOPUS ID: 2-s2.0-105002687672 04/01/2025