Diabetes Rates Rise in Philadelphia, Drexel Team Finds November 16, 2014 Research by Longjian Liu, MD, PhD, MSc, FAHA, Associate Professor of Epidemiology and Biostatistics & Interim Chair, Department of Environmental and Occupational Health, is discussed in a WHYY and Newsworks.org story. Liu and Drexel University College of Medicine colleague Ana Núñez found a strong link between disadvantaged neighborhoods in Philadelphia and high rates of diabetes. Liu tracked diabetes rates for different ZIP codes across the city for two time periods: 2002-2004 and also for 2008-2010. In the earlier period, 21 ZIP codes had highest rates of diabetes (10.6 percent or more). Years later, 29 ZIP codes across the city had the highest rate. View Story