ASTS accredited Transplant Fellowship Program

in liver and kidney transplantation

                                            Fellows Education and Calendar


                                                                                                                 GME brochure

Fellowship Directors  

2018- now

John Fung MD PhD/  Piotr Witkowski MD PhD


2012-2018                                2000- 2012 

John Renz MD PhD            J Michael Millis MD


John Fung MD PhD- Chief, Transplantation Institute  


Rolf Barth MD- Associate Director, Transplantation Institute

Piotr Witkowski MD PhD- Director, Pancreas and Islet Transplantation Program


John LaMattina MD- Associate Professor


Diego di Sabato MD- Director, Living Donor Liver Transplantation


Angelica Perez-Guttierez MD- Director, Pediatric Kidney Transplantation Program


Surgical Procedures- Volume

                                                                                    Jan 2022         2021        2020    


Liver transplantation (total)                                                                                       5                       76                    71                     

Living donor liver transplantation                                                                            2                         9                     4

Kidney transplantation (total)                                                                                  13                      174                  116                                              

Living donor kidney transplantation                                                                        1                       29                    27


Pancreas transplantation (SPK, PTA, PAK)                                                              1                        11                      5


Islet allo-transplantation                                                                                           2                        10                     4



read about our islet transplant program    >





Current Transplant Surgery Fellows 


Yaser AlSalmay MD 


Kumar Jayant MD PhD
2020- 2022 

Dr. Jayant was trained in India and UK, where obtained his PhD in hepatobiliary surgery. 

Dr. ALSalmay has joined us after the completion of his general surgery residency in Northwell Health Hospital,  Manhasset, NY.  He competed his medical education in Yemen. 

Upcoming Fellow 


Piotr J Bachul MD 


Dr. Bachul accomplished his surgical training at Jagiellonian University in Krakow, Poland. Subsequently, he has been a research fellow in the Islet Transplantation Laboratory at University of Chicago. 

Previous Fellows 


Braden Juengel MD 


Dr. Joungel has extended his training for another year as a research fellow in islet transplantation at our Program

Angelica Perez

Gutierrez MD 


Ragheed Saoud MD 

Dr. Perez Gutierrez came to us as fully trained general surgeon from Mexico City and also after her 2 years of research fellowship in transplantation at University of Pittsburg. Once accomplished 2 year ASTS fellowship with us, she has stayed with us for 1 year fellowship in pancreatic islet transplantation. 

Now, she has joined our faculty as a Clinical Associate. 

Dr. Saoud came as a fully trained urologist from Lebanon. 

He accomplished with us 1 year of training in kidney and pancreas transplantation and then pursed his fellowship in urologic oncology and robotic surgery with Dr. Shalhav at our Institution.

Currently, he is an attending urologist in Northwell Health Hospital,  Manhasset, NY.




Conferences and Workshops

  • American Transplant Congress, May 2022 ​, (Dr. Al-Salmay, Dr. Jayant)

  • Winter ASTS Symposium, Miami, FL, January 2022. (Dr. Al-Salmay, Dr. Jayant)

  • Laparoscopic Donor Nephrectomy Workshop, August 2021, Houston TX (Dr. Al-Salmay, Dr. Jayant)


  • Annual AST Fellows Symposium, September 2021 (for first year fellows) (Dr. Al-Salmay, Dr. Jayant)


  • Annual AST Fellows Symposium, September 2021 (for first year fellows) (Dr. Al-Salmay, Dr. Jayant)

Virtual Tour: the legacy- now and then  



Fellow's Publications

  •  Witkowski P, Philipson LH, Buse JB, , Robertson RP, Alejandro R, Bellin M, Kandeel F, Baidal D, Gaglia J, Posselt AM, Anteby R, Bachul PJ, Al-Salmay Y, Jayant K, Perez-Gutierrez A, Barth R, Fung J, Camilo Ricordi. Islet Transplantation at a Crossroads - Need for Urgent Regulatory Update in the United States: Perspective Presented During the Scientific Sessions 2021 at the American Diabetes Association Congress" Frontiers in Endocrinology, 2022 in press.

  • Jayant K, Reccia I, Bachul PJ, Al-Salmay Y, Pyda JS, Podda M, Perez-Gutierrez A, Dor F, Becker Y, Sabato D, LaMattina J, Barth R, Fung J, Witkowski P. The impact of COVID-19 on kidney transplant recipients in pre-vaccination and delta strain era: a systematic review and meta-analysis. J Clin Med 2021 in press. 

  • Bachul PJ, Gołąb K, Pyda JS, Basto L, Borek P, Perea L, Tibudan M, Perez Gutierrez A, Fung J, Matthews JM, Witkowski P. Post-hoc Analysis of a Randomized, Double Blind, Prospective Study: More Standardizations in the Trial Protocol are Needed to Evaluate the Effect of a CXCR1/2 Blocker in Islet Allotransplantation. Cell Transplant 2021, Jan-Dec 2021;30:9636897211001774.

  • Jayant K, Reccia I, Virdis F, Pyda JS, Bachul PJ, Di Satabo D, Barth RN, Fung J, Baker T, Witkowski P. COVID-19 in hospitalized liver transplant recipients: An early systematic review and meta-analysis. Clinical Transplantation. 2021; 00:e14246.

  • Bachul PJ, Gołąb K, Basto L, Borek P, Perea L, Tibudan M, Pyda JS, Perez-Gutierrez A, Fung J, Matthews JM, Witkowski P. Long-term stability of beta cell graft function after total pancreatectomy and islet autotransplantation. Pancreas, 2021 Jan 1;50(1):e2-e4. doi: 10.1097/MPA.0000000000001711.

  • Witkowski P, Philipson L, Kaufman DB, Ratner L, Abouljoud, Bellin M, Buse J, Kandeel F, Stock P, Mulligan D, , Markmann F, Kozlowski T, Andreoni K, Alejandro R, Baidal D, Hardy MA, Wickrema A, Mirmira RG, John Fung J, Becker YT, Josephson MA, Bachul PJ, Pyda JS, Charlton M, Millis JM, Gaglia J, Stratta RJ, Fridell JA, Niederhaus S, Forbes RC, Jayant K, Robertson RP, Odorico J, Levy M, Harland R, Abrams PL, Olaitan OK, Kandaswamy R, Wellen J, Japour AJ, Desai CS, Naziruddin B, Balamurugan AN, Barth RN, Ricordi C. The “Islets for US” Collaborative. The Demise of Islet Allotransplantation in the US: A Call for an Urgent Regulatory Update Urgent need for a regulatory update. Am J Transplant, 2020, Nov 29, doi:10.1111/ajt.16397.

  • Bachul PJ, Grybowski DJ, Anteby R, Basto L, Perea L, Gołąb K, Wang LJ, Tibudan M, Perez-Gutierrez A, Komorniczak M, Nagpal S, Lucander A, Fung J, Matthews JM, Witkowski P. Total pancreatectomy with islet autotransplantation in diabetic and prediabetic patients with intractable chronic pancreatitis. J Pancreatology, 2020, Jun;3(2):86-92. doi: 10.1097/jp9.0000000000000048.

  • Generette G, Bachul PJ, Golab K, Basto L,  Pyda JS, Anteby R, Borek P, Tibudan M, Perea L, Charlton M, Perez-Guttierez A, Jayant K, Lucander  A, Matthews JB, Millis JM, Fung J, En Bloc Liver and Pancreas Transplantation after Total Pancreatectomy with Autologous Islet Transplantation.2020 Nov 23,

  • Ezzelarab MB, Perez-Gutierrez A, Humar A, Wijkstrom M, Zahorchak AF, Lu-Casto L, Wang YC, Wiseman RW, Minervini M, Thomson AW. Preliminary assessment of the feasibility of autologous myeloid-derived suppressor cell infusion in non-human primate kidney transplantation. Transpl Immunol. 2019. Oct; 56: 101225.

  • Perez-Gutierrez A, Metes DM, Lu L, Hariharan S, Thomson AW, Ezzelarab MB. Characterization of eomesodermin and T-bet expression by allostimulated CD8+ T cells of healthy volunteers and kidney transplant patients in relation to graft outcome. Clin Exp Immunol. 2018 Nov;194(2):259-272

  • Lee JC, Olaitan OK, Lopez-Soler R, Renz JF, Millis JM, Gottlieb LJ. Expanding the envelope: the posterior rectus sheath-liver vascular composite allotransplant. Plast Reconstr Surg. 2013 Feb; 131(2): 209e-218e.

  • Ragab A, Lopez-Soler R, Oto A, Testa G. Correlation between 3D-MRCP and intra-operative findings in right liver donors. Hepatobiliary Surg Nutr. 2013 Feb;2(1):7-13. 

  • Byam J, Renz J, Millis JM. Liver transplantation for hepatocellular carcinoma. Hepatobiliary Surg Nutr. 2013 Feb;2(1):22-30. 

  • Mao Y, Yang H, Xu H, Lu X, Sang X, Du S, Zhao H, Chen W, Xu Y, Chi T, Yang Z, Cai J, Li H, Chen J, Zhong S, Mohanti SR, Lopez-Soler R, Millis JM, Huang J, Zhang H. Golgi protein 73 (GOLPH2) is a valuable serum marker for hepatocellular carcinoma. Gut. 2010 Dec; 59(12):1687-93. 


Virtual Tour- video

Fellow's Presentations 

American Association for the Study of Liver Diseases (AASLD), ​​2022  ​​

  • Jayant K, Al-Salmay Y, Reccia I, Podda M, Virdid F, Machairas N, DiSabatto D, LaMattina J, Witkowski P, Barth R N, Fung JJ. Stress-Induced Cardiomyopathy In Liver Transplant Recipients: A Systematic Review Of A Rare And Serious Complication

ASTS Winter Symposium, ​​2022  ​​

  • Bachul P,  Perez- Guetierrez A, Al-Salmay Y, Juengel B, Jayant K, Basto L, Wang LJ, Perea L, Tibudan M, Thomas C, Barth R, Fung J, Witkowski P. Islet Allotransplantation Into Pre-Vascularized Sernova Cell PouchTM - Preliminary Results From The University of Chicago.

American Transplant Congress, ​​2022 

Bachul P,  Perez- Guetierrez A, Al-Salmay Y, Juengel B, Jayant K, Basto L, Wang LJ, Perea L, Tibudan M, Thomas C, Barth R, Fung J, Witkowski P. Islet Allotransplantation Into Pre-Vascularized Sernova Cell PouchTM - Preliminary Results From The University of Chicago.

American Diabetes Association, ​​2022  ​​

  • Juengel B, Bachul P, Al-Salmay Y, Juengel B, Jayant K, Perez Gutierrez A, Basto L, Perea L, Wang LJ, Tibudan M, Barth R, Fung J, Witkowski P,  A,  Effectiveness Of Covid-19 Vaccination In The Islet Transplant Recipients.​ YOUNG INVESTIGATOR AWARD!

  • Bachul P,  Perez- Guetierrez A, Al-Salmay Y, Juengel B, Jayant K, Basto L, Wang LJ, Perea L, Tibudan M, Thomas C, Barth R, Fung J, Witkowski P. Islet Allotransplantation Into Pre-Vascularized Sernova Cell PouchTM - Preliminary Results From The University of Chicago.

American Transplant Congress, ​​2021 

  • Jayant K.  The Impact of Covid-19 in Kidney Transplant Recipients: A Systematic Review and Meta-analysis (oral) 

  • .Jayant K.  Analyzing the Impact of Covid-19 in the Hospitalized Cohort of Liver Transplant Recipients: An Early Systematic Review and Meta-Analysis..

  • Bachul PJ, Borek PE, Gabriela S.Generette, Perez-Guetierrez A, Jayant K, Golab K, Basto L, Perea L, Tibudan M, Thomas C, Philipson L, Fung J, Witkowski P. Islet Allotransplantation into the Pre-Vascularized Sernova Cell PouchTM Device - Preliminary Results of the Phase I/II Prospective, Open-Label, Single-Arm Study at University of Chicago (oral). 

  • Perez-Gutierrez A, Bachul PJ, Juengel B, Witkowski P, DiSabato D, Barth RN, Fung J, Becker YT, The Role Of The B2 Microglobulin Trend In Patients With Delayed Graft Function After Kidney Transplant. 

  •  Perez-Gutierrez A, Bachul PJ, D. N. Danz, B. Juengel, M. Josephson2, J. Fung2, P. Witkowski2, B. Chung4, Y. Becker2, The Seattle Heart Failure Model Is A Predictor Of Mortality After Kidney Transplant In Patients With End Stage Renal Disease And Heart Impairment. 

ASTS Winter Symposium, ​​2021  

  • Bachul P.  Bachul PJ, Borek PE, G Gabriella, Perez-Guetierrez A, Golab K, Basto L, Perea L, Lorencia, Tibudan M, Thomas C, Philipson L, Fung J, Witkowski P. Islet Allotransplantation Into Pre-Vascularized Sernova Cell PouchTM - Preliminary Results From The University of Chicago.

  • Generette G, Bachul PJ, Perez-Guetierrez A, Joungel B, Borek PE, Becker YT, Barth R, Fung J, Witkowski P. Anterior Rectus Sheath Versus Gibson Incision For Kidney Transplantation -Preliminary Experience.

  • Perez Gutierrez A, Baker T, Becker YT, Witkowski P, Fung J.  A,  Simultaneous Heart/Liver/Kidney Transplant : The Challenge Is In The Choreography. Read full article

American Transplant Congress, ​​2019 

  • Perez Gutierrez A, Donor Reactive Eomesderminhi CD8+ T Cells Are Significantly Upregulated Early after Transplant in Kidney Transplant Patients without Rejection. 

  • Logan Galansky, Joshua Aizen, Ciro Andolfi, Ragheed Saoud, Osmanuddin Ahmed, Arieh Shalhav. The effect of selective angioembolization on renal function for iatrogenic vascular lesions after partial nephrectomy: a matched case-control study. American Urology Association, 2019

Previous Transplant Fellows


Omar Hussain MD


Jerome Byam MD,

Staff Surgeon,

United Medical Center, Washington DC

2011- 2013 

Qi Li MD

Private Practive

New Heaven, Il

2010- 2012 

Oyedolamu K Olaitan MD

Associate Professor,

Section of Transplantation

Rush University Medical Center, Chicago, IL

2009- 2011

Raynold Lopez-Soler MD PhD

Associate Professor

Layola Medical Center, Chicago, IL


Bejon T Maneckshama MD

Assistant Professor,

Section of Transplantation

Hartford Hospital Medical Center, CT


Inbo Shim, M.D.

Staff Surgeon,

VA Hospital, NC


Tiffany L Anthony MD 

Associate Professor

Baylor Medical Center, Dallas, TX



John Milner, M.D.,

Assistant Professor,

Loyola University, Chicago, IL



Julian Losanoff, M.D.

Professor and Chairman of Surgery,

VA Southern Nevada Healthcare System



Sanjay Kulkarni, M.D.,

Associate Professor of Surgery, Yale University School of Med. New Haven, CT.,

Director of Kidney and Pancreas Transplantation



Randolph Schaffer, M.D.,

Scripps Clinic, La Jolla, CA



Charles Winans, M.D.,

Assistant Professor of Surgery,

Cleveland Clinic, Cleveland, OH



Somchai Limsrichamrern, M.D.,

Siriraj Hospital, Bangkok, Thailand



Christoper Siegel, M.D.,

Director, Adult Kidney-Pancreas and Pediatric Liver Transplant Programs,

University Hospitals, Cleveland, OH



Joseph Buell, M.D.,

Assistant Professor of Surgery,

Director, Israel Penn International Transplant Tumor Registry, University of Cincinnati, OH



Atsushi Yoshida, M.D.,

Senior Staff Surgeon, Div. of Transplant Surgery, Henry Ford Hospital, Detroit, MI



Hani P. Grewal, M.D.,

Associate Professor,

Mayo  Clinic Jacksonville, FL



George E. Loss, M.D., Ph.D.,

Professor, Chief, Section of Transplantation,

Ochsner Clinic, New Orleans, LA



David C. Cronin, M.D.,

Associate Professor,

Director of Liver Transplantation

Medical College of Wisconsin


Magaral Rajesekar, M.D.,

Director, Liver Transplant Program,

New Delhi, India


David S. Seaman, M.D,

Private Practice in Virginia