A consistency test of white dwarf and main sequence ages: NGC 6791 E. García-Berro, S. Torres, J. Isern, M. Salaris, A.H. Córsico and L.G. Althaus EPJ Web of Conferences, 43 (2013) 05003 Published online: 21 March 2013 DOI: 10.1051/epjconf/20134305003