TY - JOUR A1 - Trovato, F. A1 - Heyen, N. T1 - A varied pattern of change of the sex differential in survival in the G7 countries Y1 - 2006 DO - 10.1017/S0021932005007212 JF - Journal of Biosocial Science VL - 38 SP - 391 EP - -401 ER -