Scientists have been studying the impact of racism on health. Amani Nuru-Jeter, a social epidemiologist at the University of California, Berkeley and other doctors have been hypothesizing that exposure to chronic stress may be one way racism contributes to health disparities between racial groups. Arline Geronimus, a research professor at the University of Michigan Institute for Social Research and a professor at the School of Public Health, and her colleagues found that psychosocial stress associated with living in extreme poverty can cause early onset of age-related diseases. The 2015 study titled, "Race-Ethnicity, Poverty, Urban Stressors, and Telomere Length in a Detroit Community-based Sample" was conducted in order to determine the impact of living conditions on health and was performed by a multi-university team of social scientists, cellular biologists and community partners, including the Healthy Environments Partnership (HEP) to measure the telomere length of poor and moderate-income people of White, African-American and Mexican race.