Sanja Jelic, MD Title: Pulmonologist, Associate Professor Sanja Jelic, MD, is a board-certified pulmonologist and sleep specialist who teaches in the Division of Pulmonary, Allergy, and Critical Care Medicine at the Columbia University College of Physicians and Surgeons. Her interests include the cellular mechanisms of vascular endothelial dysfunction in obstructive sleep apnea, sleep deprivation and COPD.She graduated from the University of Zagreb School of Medicine in Croatia. Dr. Jelic completed a residency in internal medicine at Albert Einstein College of Medicine and a fellowship in pulmonary, critical care and sleep medicine at Columbia Presbyterian Medical Center. About Health Health.com, a Dotdash Meredith Brand, is an award-winning online resource for empathetic, trustworthy, and actionable health and wellness information so you can make the best choice for your health. We reach more than 9 million readers a month. We ensure the accuracy of our content by relying on seasoned health journalists, credentialed medical professionals and thorough fact checkers. Learn more about us and our editorial process.