Episode 14: Under 6 and overweight by Harvard University published on 2012-06-27T13:50:51Z Elsie Taveras, an assistant professor of population medicine and of pediatrics at HMS, discusses a new Institute of Medicine report on early childhood obesity. Plus, Assistant Professor of Cell Biology Stephen Liberles explores how mice and rats sense predators. Harvard Medical School Office of Communications and External Relations. Jul 26, 2011. Copyright 2012 The President and Fellows of Harvard College.