Ype P. de Jong, M.D., Ph.D.

Dr. Calley Levine is an Assistant Professor of Medicine and Attending Physician in the Division of Gastroenterology and Hepatology at NewYork-Presbyterian/Weill Cornell Medical Center. She earned her Bachelor of Science in Engineering in Computer Science and Digital Media Design from the University of Pennsylvania, and received her medical degree from New York Medical College, where she was elected to the Alpha Omega Alpha Honor Medical Society. Dr. Levine completed her internal medicine residency at The Mount Sinai Hospital, followed by fellowship training in gastroenterology and hepatology at Montefiore Medical Center/Albert Einstein College of Medicine.At Weill Cornell, Dr. Levine oversees the Direct Access Colonoscopy (DAC) Program and serves as a GI hospitalist, specializing in the care of patients on the inpatient consultation service. Her clinical interests include inpatient GI care, colon cancer screening, and medical education, with a focus on the training and mentorship of GI fellows. She is actively involved in several professional societies, including the New York Society for Gastroenterology and Endoscopy, the American College of Gastroenterology and the American Society for Gastrointestinal Endoscopy.

Hai Chen, M.D., Ph.D., is a neurophysiologist and epileptologist (seizure specialist) at Weill Cornell Medicine. After earning his MD and PhD and performing ground-breaking research, Dr. Chen completed his internship and residency at UT-Southwestern Medical Center from 2010-2014. He then completed Clinical Neurophysiology and Epilepsy fellowship at NYU from 2014-2016. He joined the faculty in the Neurology Department at George Washington University where he was promoted to Associate Professor of Neurology in 2021. He joined Weill Cornell and New York-Presbyterian in February 2023Dr. Chen is board certified in Neurology, Epilepsy and Clinical Neurophysiology. His clinical interests include intractable epilepsy, anti-seizure medications, epilepsy surgery, and deep brain electrical stimulation. Dr. Chen provides services for patients with epilepsy in both the inpatient and outpatient settings. Dr. Chen has been investigating the utilization of electroencephalography (EEG) in detecting seizures. He has also conducted studies on optimizing anti-seizure medications and neuromodulation in epilepsy patient care. His publication record includes multiple papers from his research study in major scientific journals. Dr. Chen has also been the principal-investigator for an anti-seizure medication clinical trials at George Washington University. He has also served on committees at the American Epilepsy Society and as a reviewer for peer-reviewed journals. He has been an invited speaker to discuss seizure treatment at the national neurology conference. He is also an advocate for seizure patients and served as a board member of the Epilepsy Foundation, DC Chapter.

Dr. Randy Longman received his undergraduate degree from Yale University where he graduated summa cum laude. He was simultaneously awarded a Master of Science for his biochemistry research. He received his medical doctorate from Cornell Medical College and his Ph.D. in immunology from the Rockefeller University. He subsequently completed internship and residency training in Internal Medicine and fellowship training in Gastroenterology at the NewYork Presbyterian Hospital: Columbia-Presbyterian Medical Center. He joined the Jill Roberts IBD Center at Weill Cornell in 2013 where he is an Assistant Professor of Medicine.Clinically, Dr. Longman focuses on the care of patients with Ulcerative Colitis and Crohns' disease. His active research focuses on understanding the role for bacteria in inflammatory bowel disease. His work has been published in Nature, Science, Journal of Experimental Medicine, and Blood. For this work, he has received numerous awards as well as funding from both the American Gastroenterological Association and the National Institutes of Health. He has a particular interest in the care of IBD patients with joint pains and serves as a co-investigator on research studies to better understand the underlying cause.