Can anyone please direct me to the best evidence (preferably based on longitudinal studies) regarding the relative contributions of genetic, material and psychosocial factors to the intra- or international variance in mortality / life expectancy between individuals and/or population groups? Many thanks, Alex ****************************************************************** Alex Scott-Samuel EQUAL (Equity in Health Research and Development Unit) Department of Public Health University of Liverpool Whelan Building Quadrangle Liverpool L69 3GB Tel (+44)151-794-5569 Fax (+44)151-794-5588 e-mail [log in to unmask] ******************************************************************