Ranga Krishnan, MB, ChB, is CEO of the Rush University System for Health. Prior to joining Rush, he was dean of Duke-NUS Graduate Medical School in Singapore and an international expert in treating brain disorders of the elderly. As dean of the new Duke-NUS Graduate Medical School, he built the education and research infrastructure. During his tenure at Duke-NUS, the school has developed and implemented a new method of learning called Team LEAD, which has been adopted by other universities and high schools. Dr. Krishnan has written three books, more than fifty textbook chapters, and more than two hundred journal articles.