Clinical Research
![Dr. Thomas Cotter](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/cotter-thomas-square.jpg)
Research Interests: Dr. Cotter's research is primarily outcomes-based and is focused on improving the care of patients with alcohol-associated liver disease and of liver transplant recipients.
![Dr. Kerry Dunbar](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/dunbar-kerry-square.jpg)
Research Interests: Barrett's esophagus, Eosinophilic esophagitis, Esophageal motility disorders, Gastroesophageal reflux disease, and Novel endoscopic imaging
![Dr. David Fudman](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/fudman-david-square.jpg)
Research Interests: Inflammatory bowel disease and Quality improvement
![Dr. Nisa Kubiliun](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/kubiliun-nisa-square.jpg)
Research Interests: Pancreatic cancer early detection and prevention, genetic risk for pancreatic malignancies
![Dr. William M. Lee](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/lee-william-square.jpg)
Research Interests: Acute liver failure, Drug-induced hepatotoxicity, Hepatitis B, Hepatitis C
![Dr. Sarah Lieber](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/lieber-sarah-square.jpg)
Research Interests: Dr. Leiber’s research interests are focused on liver transplantation outcomes, patient reported outcomes, and health behavior intervention design.
![Dr. Jeremy Louissaint](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/louissaint-jeremy-square.jpg)
Research Interests: Dr. Louissaint’s research interests are focused on leveraging telehealth to improve the outpatient care of patients with cirrhosis, especially using effective technology-based patient-provider communication tools.
![Dr.
Marlyn Mayo](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/mayo-marlyn-square.jpg)
Research Interests: Primary Biliary Cholangitis, Cholestatic Pruritus, Primary Sclerosisn Cholangitis, Autoimmune Hepatits, Hepatorenal Syndrome, and Medical Education
![Dr. Mack Mitchell](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/mitchell-mack-square.jpg)
![photo of Dr. Jacqueline O'Leary](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/o-leary-jacqueline-square.jpg)
Research Interests: Acute-on-Chronic Liver Failure, Antibody Mediated Rejection in Liver Transplantation, NASH
![photo of Dr. Nicole Rich](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/rich-nicole-square.jpg)
Research Interests: Hepatitis C screening in underserved populations, Hepatocellular carcinoma (HCC) prognosis and treatment, Racial/ethnic disparities in liver diseases
![Dr. Tarek Sawas](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/sawas-tarek-square.jpg)
Research Interests: Esophageal Cancer Risk Factors and Treatment, Pancreaticobiliary Cancer, Bariatric Endoscopy Outcomes
![photo of Dr. Amit Singal](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/singal-amit-square.jpg)
Research Interests: Effectiveness of surveillance for hepatocellular carcinoma, Impact of patient and physician knowledge/attitudes on receipt of care, Quality of care in the cirrhotic patient
![photo of Dr. Anna Tavakkoli](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/tavakkoli-anna-square.jpg)
Research Interests: Disparities in gastrointestinal malignancies, quality improvement of ERCP, and outcomes after ESG and TORe
![photo of Dr. Lisa VanWagner](/departments/internal-medicine/divisions/digestive-liver-diseases/assets/vanwagner-lisa-square.jpg)
Research Interests: Her research utilizes human population-based approaches, large electronic health record data analysis and health services research methods to define and characterize cardiometabolic disease risk prediction, prevention and treatment approaches in patients with chronic liver disease.