Graduate Medical Education



Gastroenterology fellows participate in ongoing independent research and become proficient in the critical assessment of the medical literature pertinent to gastroenterology and hepatology. To advance fellow’s professional development and research experience, dedicated research faculty members provide additional support and expertise. Current faculty research interests include interventional endoscopy, endoscopic quality, hepatology, motility, fecal microbiota transplant, and inflammatory bowel disease. Recent research studies have included fecal microbial transplantation protocol implementation, clinical trials for gastroparesis, incidence of colonic diverticulosis and diverticulitis in patients with adult polycystic kidney disease, CT angiography for GI bleed, and methods for improved adenoma detection rates.

Each fellow is expected to have at least one peer‐reviewed publication during the three-year fellowship. Time is protected for pursuit of meaningful research and advancement of best practices. Additional training and statistical support is also available through the department of research and innovation at St. Luke’s University Hospital.

St. Luke’s University hospital is in the process of initiating a peer-reviewed clinical research journal.

2024 Publications

Liaquat H, Harmouch F, Patel N, et al. (January 03, 2024) Association of Metabolic Syndrome Components and Colonic Diverticulosis in the Very Elderly: A Tertiary Health Network Study. Cureus 16(1): e51610. doi:10.7759/cureus.51610


2023 Publications

Prenatt Z, Liaquat H, Shupp B, Stoll L, Schneider Y. Esophageal Neuroendocrine Carcinoma Presenting After Definitive Chemoradiation of Squamous Cell Carcinoma in the Same Location. ACG Case Reports Journal. 2023 Jun;10(6).

Prenatt Z, Liaquat H, Lovett T, Evans J, Srivilli M, Marzotto N, Martins N. Impact of Epic Smartlist and Lumens Software in Improving OP-29 Compliance at a Tertiary Health Care Network. Cureus. 2023 Jun 9;15(6).

Shupp B, Liaquat H, Prenatt Z, Stoll L, Matin A. A Rare Case of Abdominal Wall Skeletal Muscle Metastasis From Adenocarcinoma of the Pancreatic Head. Cureus. 2023 Jul 6;15(7).


2022 Publications

A Rare Case of Synchronous Intraductal Papillary Mucinous Neoplasm-Associated Pancreatic Adenocarcinoma and Signet Ring Cell Gastric Adenocarcinoma.
Shupp B, Liaquat H, Rollins S, Stoll L, Singh G, Quiros RM, Matin A.
Am J Case Rep. 2022 Aug 8;23:e935242. doi: 10.12659/AJCR.935242.PMID: 35939415

Cost Effectiveness of Second-Line Axicabtagene ciloleucel in Relapsed Refractory Diffuse Large B-cell Lymphoma.
Kambhampati S, Saumoy M, Schneider Y, Serrao S, Solaimani P, Budde LE, Mei MG, Popplewell L, Siddiqi T, Zain J, Forman SJ, Kwak LW, Rosen ST, Danilov AV, Herrera AF, Thiruvengadam N.
Blood. 2022 Aug 1:blood.2022016747. doi: 10.1182/blood.2022016747. Online ahead of print.
PMID: 35914220

Cost Effectiveness of Polatuzumab Vedotin Combined with Chemoimmunotherapy in Untreated Diffuse Large B-cell Lymphoma.
Kambhampati S, Saumoy M, Schneider Y, Pak S, Budde LE, Mei MG, Siddiqi T, Popplewell L, Wen YP, Zain J, Forman SJ, Kwak LW, Rosen ST, Danilov AV, Herrera AF, Thiruvengadam N.
Blood. 2022 Jun 14:blood.2022016624. doi: 10.1182/blood.2022016624. Online ahead of print.
PMID: 35700381

Proton pump inhibitor therapy usage and associated hospitalization rates and critical care outcomes of COVID-19 patients.
Shupp B, Mehta SV, Chirayath S, Patel N, Aiad M, Sapin J, Stoltzfus J, Schneider Y.
Sci Rep. 2022 May 9;12(1):7596. doi: 10.1038/s41598-022-11680-0. PMID: 35534666

Fully Covered Self-expanding Stents are Cost-effective at Remediating Biliary Strictures in Patients With Chronic Pancreatitis.
Thiruvengadam NR, Saumoy M, Schneider Y, Kochman ML.
Clin Gastroenterol Hepatol. 2022 Feb 15:S1542-3565(22)00145-8. doi: 10.1016/j.cgh.2022.02.019. PMID: 35181569
Endoscopic Treatment of Reflux: A Comprehensive Review.
Duarte Chavez R, Marino D, Kahaleh M, Tyberg A.
J Clin Gastroenterol. 2022 Aug 30. doi: 10.1097/MCG.0000000000001757. Online ahead of print.PMID: 36040930

Endoscopic Ultrasound-Directed Transgastric ERCP (EDGE) Utilization of Trends Among Interventional Endoscopists.
Shah-Khan SM, Zhao E, Tyberg A, Sarkar S, Shahid HM, Duarte-Chavez R, Gaidhane M, Kahaleh M.
Dig Dis Sci. 2022 Aug 10. doi: 10.1007/s10620-022-07650-1. Online ahead of print.PMID: 35947304

Device-assisted submucosal tunneling endoscopic resection for rectal gastrointestinal stromal tumor.
Kim M, Duarte-Chavez R, Kahaleh M.
Endoscopy. 2022 May 13. doi: 10.1055/a-1824-4691. Online ahead of print.PMID: 35561988

Therapeutic endoscopic ultrasound.
Duarte-Chavez R, Kahaleh M.
Transl Gastroenterol Hepatol. 2022 Apr 25;7:20. doi: 10.21037/tgh-2020-12. eCollection 2022.PMID: 35548470

Per-oral Endoscopic Myotomy: State of the Art.
Liu-Burdowski J, Duarte-Chavez R, Kahaleh M.
J Clin Gastroenterol. 2022 Jan 1;56(1):16-22. doi: 10.1097/MCG.0000000000001620.PMID: 34653065

Traction-assisted endoscopic submucosal dissection with submucosal tunneling for Barrett's esophagus nodularity.
Duarte-Chavez R, Kim M, Marino D, Kahaleh M.
Endoscopy. 2022 Jun;54(6):E275-E276. doi: 10.1055/a-1499-6267. Epub 2021 Jun 18.PMID: 34144614


2021 Publications

A Cost-Effectiveness Analysis for Post-Endoscopic Retrograde Cholangiopancreatography Pancreatitis Prophylaxis in the United States.
Thiruvengadam NR, Saumoy M, Schneider Y, Attala S, Triggs J, Lee P, Kochman ML.
Clin Gastroenterol Hepatol. 2022 Jan;20(1):216-226.e42. doi: 10.1016/j.cgh.2021.08.050. Epub 2021 Sep 2. PMID: 34481952

Threshold Analysis of the Cost-effectiveness of Endoscopic Ultrasound in Patients at High Risk for Pancreatic Ductal Adenocarcinoma.
Kumar S, Saumoy M, Oh A, Schneider Y, Brand RE, Chak A, Ginsberg GG, Kochman ML, Canto MI, Goggins MG, Hur C, Kastrinos F, Katona BW, Rustgi AK.
Pancreas. 2021 Jul 1;50(6):807-814. doi: 10.1097/MPA.0000000000001835. PMID: 34149034

Biosimilars in Inflammatory Bowel Disease.
Buchner AM, Schneider Y, Lichtenstein GR.
Am J Gastroenterol. 2021 Jan 1;116(1):45-56. doi: 10.14309/ajg.0000000000000844. PMID: 33110013

A Curious Case of a Staple Line Leak Presenting 18 Months After Sleeve Gastrectomy: Our Management Approach.
Galvez A, King K, El Chaar M, Matin A, Claros L.
Obes Surg. 2021 Jan;31(1):421-423. doi: 10.1007/s11695-020-04825-5. Epub 2020 Jul 2.PMID: 32617924

Comparison of the impact of chronic corticosteroid therapy on critical care outcomes of COVID-19 patients with and without history of chronic liver disease.
Liaquat H, Shupp B, Rollins S, Schneider Y, Matin A.
Sci Rep. 2021 Sep 28;11(1):19245. doi: 10.1038/s41598-021-98778-z.PMID: 34584170

Mycobacterium avium Complex Infection Imitating Whipple Disease in an Immunocompromised Patient With Newly Diagnosed Acquired Immunodeficiency Syndrome.
Chirayath S, Bin Liaquat H, Bahirwani J, Labeeb A, Chaput K, Kaza C.
ACG Case Rep J. 2021 May 12;8(5):e00588. doi: 10.14309/crj.0000000000000588. eCollection 2021 May. PMID: 34549062

Plummer-Vinson Syndrome: A Rare Cause of Dysphagia in an Octogenarian.
Harmouch F, Liaquat H, Chaput KJ, Geme B.
Am J Case Rep. 2021 Apr 24;22:e929899. doi: 10.12659/AJCR.929899. PMID: 33895769

Colonic diverticular disease in autosomal dominant polycystic kidney disease: is there really an association? A nationwide analysis.
Duarte-Chavez R, Stoltzfus J, Yellapu V, Martins N, Nanda S, Longo S, Geme B, Schneider Y
Int J Colorectal Dis. 2021 Jan;36(1):83-91. doi: 10.1007/s00384-020-03736-2. Epub 2020 Sep 1. PMID: 32875377.

Effect of Using Personal Protective Equipment during the COVID-19 Pandemic on the Quality Indicators of Screening Colonoscopies.
Chirayath S, Bahirwani J, Kaur P, Martins N, Modi R.
Gastroenterol Res Pract. 2021 Jul 27;2021:8910004. doi: 10.1155/2021/8910004. PMID: 34373691; PMCID: PMC8349272.
Multiple Myeloma Presenting as Chronic Diarrhea.
Bajwa A, Trieu J, Mirza K, Ding X, Liem B.
ACG Case Rep J. 2021 Nov 22;8(11):e00677. doi: 10.14309/crj.0000000000000677. PMID: 34820466; PMCID: PMC8608254.


2020 Publications

Which Factors Correlate with Marginal Ulcer After Surgery for Obesity?
Rodrigo DC, Jill S, Daniel M, Kimberly C, Maher EC.
Obes Surg. 2020 Dec;30(12):4821-4827. doi: 10.1007/s11695-020-04960-z. Epub 2020 Sep 16.
PMID: 32939660

Ischemic Colitis in a Patient on Venovenous Extracorporeal Membrane Oxygenation (VV-ECMO) Treatment: An Emerging Complication?
Liaquat H, Zanders TB, Bratis LE, Stoll LM, Chaput KJ. Am J Case Rep. 2020 Aug 1;21:e923374. doi: 10.12659/AJCR.923374. PMID: 32737281

High-Dose Prednisone for Treatment of Autoimmune Pancreatitis in a Patient with Coronavirus Disease 2019 (COVID-19) due to Infection with Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2).
Liaquat H, Shupp B, Kapoor S, Matin A.
Am J Case Rep. 2020 Jul 21;21:e926475. doi: 10.12659/AJCR.926475.PMID: 32692733

AGA Clinical Practice Guidelines on the Management of Moderate to Severe Ulcerative Colitis.
Feuerstein JD, Isaacs KL, Schneider Y, Siddique SM, Falck-Ytter Y, Singh S; AGA Institute Clinical Guidelines Committee.
Gastroenterology. 2020 Apr;158(5):1450-1461. doi: 10.1053/j.gastro.2020.01.006. Epub 2020 Jan 13. PMID: 31945371

Quality improvement initiative increases total paracentesis and early paracentesis rates in hospitalised cirrhotics with ascites.
Jesudian A, Barraza L, Steel P, Shen N, Schneider Y, Bodnar D, Farmer B, Dargar S, Del Toro C, Sharma R, Brown RS Jr, Lee JI.
Frontline Gastroenterol. 2020 Jan;11(1):22-27. doi: 10.1136/flgastro-2019-101199. Epub 2019 Apr 29. PMID: 31885836