TY - JOUR A1 - Alpérovitch, A. A1 - Bertrand, M. A1 - Jougla, E. A1 - Vidal, J.S. A1 - Ducimetière, P. A1 - Helmer, C. A1 - Ritchie, K. A1 - Pavillon, G. A1 - Tzourio, C. T1 - Do we really know the cause of death of the very old? Comparison between official mortality statistics and cohort study classification Y1 - 2009 DO - 10.1007/s10654-009-9383-2 VL - 24 ER -