Nicholas J. Shaheen, MD, MPH
Nicholas Shaheen is Director for the Center for Esophageal Diseases and Swallowing at the University of North Carolina and Associate Professor of Medicine and Epidemiology at the University of North Carolina School of Medicine and School of Public Health.
Dr. Shaheen attended college at Harvard University, and earned his medical degree at the University of Chicago, Pritzker School of Medicine, where he fulfilled his internship and residency requirements. He completed his clinical fellowship training at the University of North Carolina at Chapel Hill, earned his masters degree at the UNC School of Public Health, and completed a National Institutes of Health fellowship in Epidemiology. For the last 12 years, he has been a faculty member at UNC.
Dr. Shaheen's research interest is in the epidemiology and management of esophageal diseases. He is the author of numerous journal articles and book chapters related to reflux disease, motility disorders, Barrett’s esophagus, and esophageal cancer. He is currently on the editorial board of Gastroenterology and Clinical Gastroenterology & Hepatology, and is a reviewer for numerous journals including Gut, Alimentary Pharmacology and Therapeutics, Gastroenterology and Hepatology, American Journal of Medicine, JAMA, and American Journal of Gastroenterology.
Dr. Shaheen receives research funding from the National Institutes of Health, multiple private foundations, and corporations to pursue clinical and translational research in esophageal diseases. Dr. Shaheen is a member of several professional societies, including the American Gastroenterological Association, the American Society of Gastrointestinal Endoscopy, the American Medical Society, and the North Carolina Medical Society. He is a Fellow of the American College of Gastroenterology, the American Gastroenterological Association, and the American College of Physicians. He is the President of the North Carolina Society of Gastroenterology, and the Vice-Chair of the Clinical Practice section of the AGA.
Evan S. Dellon, MD, MPH
Evan Dellon is an Assistant Professor of Medicine at the UNC School of Medicine and an Adjunct Assistant Professor of Epidemiology.
Dr. Dellon received his undergraduate degree from Brown University and his medical degree from Johns Hopkins School of Medicine. He completed internship and residency in Internal Medicine at Massachusetts General Hospital. After residency, he remained at Massachusetts General for two years working as a Hospitalist and Assistant in Medicine as well as an Instructor at Harvard Medical School. He subsequently moved to Chapel Hill and completed both a clinical and a research fellowship in Gastroenterology at UNC, during which he received a master’s degree in Epidemiology from the UNC School of Public Health. His clinical training has also included experience with endoscopic retrograde cholangiopancreatography and endoscopic ultrasound.
Dr. Dellon has been at the Center for Esophageal Diseases and Swallowing since 2008. Dr. Dellon’s main research interest is in the epidemiology, pathogenesis, diagnosis, and treatment of eosinophilic esophagitis (EoE). He also has research interests in advanced endoscopic techniques. He is a member of several professional societies, including the American Gastroenterological Association, the American College of Gastroenterology, the American Society of Gastrointestinal Endoscopy, and the North Carolina Society of Gastroenterology. Dr. Dellon receives research funding from an American College of Gastroenterology Junior Faculty Development Award as well as an intramural NIH KL2 Career Development Award.
Ryan D. Madanick, MD
Ryan Madanick is an Assistant Professor of Medicine at UNC School of Medicine in Chapel Hill, North Carolina and works in the Center for Esophageal Diseases and Swallowing. Dr. Madanick attended the University of Miami in the Honors Program in Medicine, where he earned both his undergraduate and medical degrees. He completed his residency in Internal Medicine at Thomas Jefferson University Hospital in Philadelphia, Pennsylvania, where he was awarded Intern of the Year and Outstanding Teaching Resident. He returned to Miami for his subspecialty fellowship in gastroenterology at Jackson Memorial Hospital/University of Miami Medical Center. After completing his fellowship, he stayed on the faculty at the University of Miami until he moved to UNC in November 2006. He is board certified in Internal Medicine and Gastroenterology. His main clinical and research interests include refractory gastroesophageal reflux disease, extraesophageal reflux disease, Barrett’s esophagus, and esophageal motility disorders, with a prime focus on diagnosis and treatment strategies of patients with GERD who do not respond to therapy.
Roy C. Orlando, MD
Roy Orlando is UNC Professor of Medicine & Adjunct Professor of Cell and Molecular Physiology. He attended Georgetown University Medical School in Washington, D.C., was elected to AOA and graduated Cum Laude with an M.D. degree. He did his GI Fellowship at UNC and, after 2 years of military service, joined the UNC faculty. He rose to the rank of Professor of Medicine and left UNC in 1992 to assume the position of Chief of Gastroenterology & Hepatology at Tulane University in New Orleans. During his tenure at Tulane, he was also Director of the Center for Esophageal & Swallowing Disorders. In July 2007, Dr. Orlando, an internationally-recognized expert in esophageal disease, returned to UNC as full time faculty member. He is also an outstanding clinician, having been listed continuously among the ‘Best Doctors In America: Southeast Region’ from 1996 -2007.
Melissa Spacek, NP, BSN, CGRN
Melissa Spacek received her BSN at Gannon University in Erie, PA. Prior to coming to Chapel Hill, she worked in Neurology at the Medical University of South Carolina in Charleston. She joined the UNC team in March of 1996. Melissa initially worked as a staff nurse in general medicine when coming to UNC. She proceeded to specializing in Gastroenterology and Hepatology in 1997, where she joined the endoscopy staff, initially as a procedural nurse and then moving to management of UNC’s Endoscopy department. She received her certification in Gastroenterology in 2001. Melissa joined UNC’s Center for Esophageal Diseases and Swallowing in April of 2004. She is involved in both research and clinical, specializing in esophageal disorders. She is presently enrolled in UNC’s Adult Nurse Practitioner Program.
Kathleen Ferrell, PA-C, MPAS
Kathleen A. Ferrell is a certified Physician Assistant for the CEDAS group at UNC. Kathleen graduated from the Physician Assistant program at Jefferson College of Health Sciences in Roanoke, Virginia in 2007. She then completed her Masters of Physician Assistant Studies (MPAS) degree from the University of Nebraska. Kathleen worked for a private practice gastroenterology group in Christiansburg, VA for several years, before relocating to Chapel Hill, NC to work with the Center for Esophageal Diseases and Swallowing in June, 2010. She works directly with Drs. Madanick, Shaheen, Dellon, and Orlando to diagnose and treat patients with a multitude of esophageal diseases including Barrett’s esophagus, eosinophilic esophagitis, functional esophageal disorders and gastroesophageal reflux.
Xiaoxin (Luke) Chen, MD, PhD
Xiaoxin (Luke) Chen is a member of the Center for Esophageal Diseases and Swallowing (CEDAS) at the University of North Carolina, and an Associate Professor of Biology at the Cancer Research Program, Julius L. Chambers Biomedical/Biotechnology Research Institute, North Carolina Central University (NCCU).
Dr. Chen earned his medical degree at the Peking University Health Science Center (formerly Beijing Medical University), where he fulfilled his internship and continued as a resident (Orthopedic Surgery) for three years. He then went to Rutgers University, where he earned his PhD degree (Biochemistry) at the Ernest Mario School of Pharmacy. Next, he became a faculty member of the Susan Lehman Cullman Laboratory of Medicine, Department of Chemical Biology, Rutgers University. In 2005, he became a faculty member at NCCU, and joined CEDAS.
His research interest is molecular mechanism and prevention of Barrett's esophagus and esophageal adenocarcinoma. His lab also works on how inflammation may contribute to oral cancer and prostate cancer. He has authored numerous journal articles and book chapters related to oral and esophageal diseases. He is currently a reviewer for numerous journals. Dr. Chen receives research funding from the National Institutes of Health, Department of Defense, private foundations and corporations to pursue basic and translational research in Barrett's esophagus and esophageal adenocarcinoma. Dr. Chen is a member of several professional societies, including the American Association for Cancer Research.
Susan E. Moist, MPH
Susie Moist is a Project Director for the CEDAS group. Graduating from the Pennsylvania State University in 2006 with a BS in Psychology and minor in Business, Susie’s research career began in Florida focusing on substance abuse and mental health. Other research experience includes pediatric epidemiology and type 1 diabetes. In 2010 Susie relocated to North Carolina and joined the CEDAS group where she currently manages multiple research projects. Susie completed her MPH in Health Policy and Management at UNC in 2013.
Jessica Hores Gebhart, MSHS
Jessica Gebhart is a Clinical Research Coordinator/Research Specialist for the CEDAS group. After graduating from the University of North Carolina at Chapel Hill in 2007 with a BA in Exercise and Sport Science and minor in Chemistry, she began working in the GI division in colon cancer research. Jessica joined CEDAS in 2010 and has since managed numerous research projects related to esophageal and swallowing conditions. She graduated in December 2012 with her MSHS in Clinical Research Administration.
Suzanne Hallquist, MSPH
Suzanne Hallquist is a Clinical Research Assistant for the CEDAS group. Suzanne’s interest in health began as an undergraduate at Cornell University, where she majored in Human Biology. Following graduation in 1999, she pursued an MSPH in Epidemiology at Emory University. While in school, Suzanne coordinated data collection and analysis for several research studies based at Emory University Hospital. She then accepted a fellowship at the U.S. Centers for Disease Control and Prevention and continued on as a staff epidemiologist for nearly a decade. Suzanne joined CEDAS in 2012 and currently manages studies related to gastroesophageal reflux disease.
Administrative Support Specialist
Administrative Support Specialist