 - Researchers are interested in studying the environmental and genetic factors that play a role in health and living conditions as people age. Since 2002, the U.S. National Institute on Aging and the Icelandic Heart Association Research Institute have been conducting a long-term study known as the Research in Aging project to collect personal data and samples from Icelandic men and women in order to study risk factors related to disease and disability in old age. Researchers plan to initiate a second stage of the study. 