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Medical Advisory Council


Evelyn Hsu, MD

Seattle Children's Hospital

Division Chief; Director, Hepatology Fellowship Program; Medical Director, Liver Transplant Program

Evelyn Hsu, MD joined the Division of Gastroenterology and Hepatology in 2011. She earned a medical doctorate degree with honors from the University of Wisconsin in 2003, following which she completed pediatric residency training at the University of Washington/Seattle Children's Hospital in 2006.

She went on to pursue further subspecialty fellowship training at the Children's Hospital of Philadelphia in Pediatric Gastroenterology, Hepatology and Nutrition and Pediatric Advanced/Transplant Hepatology. She is boarded in Pediatrics (2006), subspecialty boarded in Pediatric Gastroenterology (2011) and has additional certification in Pediatric Transplant Hepatology (2012).


Melissa Semp, APRN

Ann & Robert H. Lurie Children's Hospital of Chicago

Liver Transplant Coordinator

Melissa is Family Nurse Practitioner.  She received her Bachelor of Science in Biology from DePaul University.  She received her Master’s in Nursing from DePaul University and went on to complete her nurse practitioner training at DePaul University earning a Post-Master’s Certificate.  Melissa joined the Lurie Children’s liver transplant team in December 2012.  She works with children and families from beginning their journey to liver transplant through the post-transplant care into young adulthood.  She is a Certified Clinical Transplant Nurse.  Melissa has an interest in pediatric to adult transition, and she is the lead clinician for the Lurie Children’s multidisciplinary solid organ transition clinic.  She is also interested in vaccination pre and post-transplant and is involved in research initiatives surrounding increased vaccination rates for pre and post-transplant children. 


Rohit Kholi, MBBS, MS

Children's Hospital of Los Angeles

Chief, Division of Gastroenterology, Hepatology and Nutrition; Director, Donnell Society; Associates Chair in Liver and Intestinal Research; Attending Physician; Investigator, Gastroenterology, Hepatology and Nutrition; Professor of Pediatrics (Clinical Scholar), Keck School of Medicine of USC

Dr. Kohli received his medical degree from the Armed Forces Medical College, India in 1999 and his MS in clinical investigation from Northwestern University in 2006. While at Northwestern he first spent three years as a pediatric gastroenterology and hepatology fellow and then subsequently as a transplant hepatology trainee before relocating to the University of Cincinnati in 2007.

His research work has focused on the pathogenesis of obesity related fatty liver disease (NAFLD). In particular, he has focused upon the role of bile acid signaling as a mechanism for NAFLD resolution after weight loss surgery. His work has also shed light on reactive oxygen stress in the generation and regulation of the extreme stage of this disease; nonalcoholic steatohepatitis (NASH). He has published many peer-reviewed articles including articles in Nature, Nature Reviews, The Journal of Biological Chemistry, Hepatology, Journal of Pediatrics, and The American Journal of Physiology. He is the author of many book chapters and review articles. He also is the recipient of the 2007 George Ferry Young Investigator Award from the Children's Digestive Health and Nutrition Foundation, a Fellowship award from the American Association for the Study of Liver Diseases, Takeda Research Innovation Award from the North American Society for Pediatric Gastroenterology, Hepatology and Nutrition Foundation.


Sanjiv Harpavat, MD, PhD

Texas Children's Hospital

Assistant Professor, Department of Pediatrics- Gastroenterology, Hepatology and Nutrition; Liver Intensive Care Unit; Liver Transplant; Liver Center

Dr. Harpavat is a pediatric gastroenterologist with special interests in neonatal cholestasis (abnormal jaundice in newborns and infants), genetic causes of liver disease such as progressive familial intrahepatic cholestasis and Wilson disease, liver transplantation, and non-alcoholic fatty liver disease. His clinical and translational research focuses on the serious liver condition biliary atresia (BA). He leads an NIH-funded multi-hospital screening initiative for BA, as well as clinical trials of novel medications to help improve outcomes in BA after the Kasai operation.


Saeed Mohammad, MD

Monroe Carell Jr. Children’s Hospital at Vanderbilt

Director, Pediatric Solid Organ Transplant Center

Director, Hepatology & Liver Transplantation

Associate Professor of Pediatrics

Vanderbilt University Medical Center

Dr. Mohammad is a Pediatric Transplant Hepatologist specializing in the care of children with chronic gastrointestinal and liver diseases. Prior to his Director role at VUMC, Dr Mohammad was at Northwestern University Feinberg School of Medicine. There, he was an Associate Professor of Pediatrics, Fellowship Director for the Transplant Hepatology Fellowship Program, and Medical Director for the Hepatology and Liver Transplantation Program at the Ann & Robert H. Lurie Children’s Hospital of Chicago. Dr. Mohammad's research focus includes improving the long term outcomes, and quality of life, of children with chronic illnesses particularly pediatric liver transplant recipients. His other areas of interest include immunosuppression withdrawal, transition of care, decision analysis and health economics.

Throughout his career, Dr. Mohammad has established himself as a leader in his field developing several innovative clinical programs at Northwestern, and has served in leadership roles in the Society of Pediatric Liver Transplantation; American Association for the Study of Liver Disease; North American Society for Pediatric Gastroenterology, Hepatology and Nutrition; Autoimmune Hepatitis Association; American Liver Foundation, and the United Network for Organ Sharing.


Lee Bass, MD

Ann & Robert H. Lurie Children's hospital of Chicago

Clinical Practice Director and Director of Endoscopy, Gastroenterology, Hepatology and Nutrition
Associate Professor of Pediatrics (Gastroenterology, Hepatology, and Nutrition), Northwestern University Feinberg School of Medicine

Dr. Bass's interests are focused on diagnosis and treatment of children with Gastrointestinal and Liver disease. Specifically, he focuses on gastrointestinal endoscopy, both for diagnostic purposes but also for new modalities of therapy and diagnostics including treatment of GI bleeding, complex polyposis syndromes, Gastrointestinal Strictures, treatment of Portal Hypertension, capsule endoscopy, Single Balloon Enteroscopy and new techniques such as Trans-nasal Endoscopy. He has an interest in cholestatic liver disease and participate in the Childhood Liver Disease Research and Education Network (CHiLDREN). As part of this collaborative he is a member of working groups in Progressive Familial Intrahepatic Cholestasis, Biliary Atresia, Alpha-1-Anti-trypsin deficiency and Portal Hypertension. He also is the principal investigator for Lurie Children's Hospital for the Fibroscan in Cholestatic Liver Disease study. In addition to this work, Dr. Bass has an interest in use of technology to provide behavioral modification for children with functional disorders.

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Danielle Sweeney, RN, BSN

Seattle Children's Hospital

Transplant Coordinator, Liver and Intestine Transplant

Danielle is both a liver transplant coordinator and neonatal intensive care unit (NICU) nurse at Seattle Children’s Hospital. She received a B.S. in Physiology and Neuroscience from University of California, San Diego, before attending Columbia University in NYC, where she received a B.S. in Nursing. She has been a NICU nurse for the entirety of her career, initially at Children’s Hospital of New York and now at Seattle Children’s. Three years ago, she joined the transplant team and now maintains a dual role in the hospital. This enables her to work in both the inpatient and outpatient settings, and care for children across the whole spectrum of acuity- from critically-ill babies in the ICU to healthy, thriving, post-transplant patients in the clinic.


Regino P Gonzalez-Peralta, MD

AdventHealth Medical Group Pediatric Gastroenterology at Orlando

Pediatric Gastroenterology & Hepatology, Pediatrics

Regino Gonzalez-Peralta, MD, is a board-certified pediatric gastroenterologist with additional board certification in pediatric transplant hepatology. Prior to joining AdventHealth Medical Group, he served as a tenured pediatrics professor, assistant dean and director of pediatric hepatology at the University of Florida and concurrently served as a pediatric hepatologist at Arnold Palmer Hospital for Children. A native of Cuba, Dr. Gonzalez-Peralta grew up in Miami and attended Cornell University before pursuing his medical degree at the Universidad Central del Este (Dominican Republic). He undertook his pediatrics residency at Cook County Hospital in Chicago, and continued as Senior Resident and Co-Chief Resident at the University of Florida before being selected for a prestigious fellowship in pediatric gastroenterology. His clinical and research interests include childhood HBV and HCV infection, pediatric liver transplant, Wilson disease, alpha 1 antitrypsin deficiency, pediatric hepatology and clinical trials.


Riccardo Superina, MD

Ann & Robert H. Lurie Children's Hospital of Chicago

Division Head, Transplant Surgery
Co-Director, Siragusa Transplantation Center
Surgical Director, Intestinal and Liver Transplant Programs
Robert E. Schneider Chair in Transplantation
Member, Lurie Children's Surgical Foundation

Northwestern University Feinberg School of Medicine

Professor of Surgery

Dr. Superina is a world-renowned authority in the field of pediatric liver, kidney and intestinal transplantation and an internationally recognized expert in the surgical treatment of complex hepatobiliary conditions, pancreatic disease and endocrine tumors.

Because pediatric transplantation requires rigorous subspecialty training beyond traditional residency and fellowship, Dr. Superina is one of only a handful of pediatric surgeons in the United States with the depth of expertise and scope of training to perform highly specialized transplantation procedures of the intra-abdominal organs in children. Dr. Superina is a leading expert on the a procedure known as the meso-rex bypass, or Rex shunt, a complex liver surgery used to restore venous circulation in a rare condition known as pediatric portal vein hypertension. He has performed more than 200 such procedures — the largest pediatric case series in the world.

Dr. Superina’s expertise is sought after by patients and peers from across the globe. In addition to treating international patients at Lurie Children’s, Dr. Superina regularly travels abroad to perform demonstration surgeries and train fellow pediatric surgeons. He also provides mentorship to foreign physicians who visit Lurie for subspecialty training.

Dr. Superina’s clinical areas of expertise include liver transplantation — living donor, reduced size, split live — biliary atresia, bile duct malformations, portal hypertension, organ donation, intestinal and kidney transplantation. Dr. Superina is also an expert in alternative operative and non-operative strategies to avert transplantation in children with end-stage organ disease.

As an academician, Dr. Superina focuses on predictors of treatment success and clinical outcomes among children undergoing complex abdominal surgeries and transplantation. He has authored nearly 170 peer-reviewed publications.

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Joshua Gossett, DNP, MBA, RN, FACHE, CPHQ, CCTC

Lucile Packard Children's Hospital Stanford
Director, Pediatric Solid Organ Transplant Center
Adjunct Professor, Widener University, Philadelphia, PA

Dr. Gossett serves on the National Transplant Administrators Committee with the United Network for Organ Sharing (UNOS) and was a team lead in the recent UNOS Pediatric Liver Improvement Collaborative. In May of 2016, Dr. Gossett founded the Pediatric Improvement Collaborative for Organ Transplant, a group of pediatric transplant administrators and QI experts that work together to support pediatric outcomes improvement across the nation.

Dr. Gossett also serves as a Quality Improvement consultant with the Advanced Cardiac Therapies Improving Outcomes Network (ACTION), which is an international improvement collaborative working to improve outcomes on children with heart failure. Other consulting activities include creation of a QI introductory module for the North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition (NASPGHAN) and consultation as an expert witness in healthcare litigation cases.

Dr. Gossett earned his BS (Biology), MBA, and DNP degrees from the Ohio State University, as well as his BSN (Nursing) from Mt. Carmel College of Nursing. He has earned a black belt in lean/six sigma, as well as various other professional certifications. He is a member of the American College of Healthcare Executives, the International Pediatric Transplant Association, the Society for Pediatric Liver Transplantation, The Transplant Society, the International Society for Heart and Lung Transplantation, as well as the American Society for Artificial Internal Organs. Dr. Gossett has numerous poster and podium publications including speaking at the American Transplant Congress, the UNOS Transplant Management Forum, and the Association of Organ Procurement Organizations.

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