00395nas a2200133   4500000000100000000000100001008004100002100001300043700001700056245016000073300000700233490000700240022001400247       2017                            d1 aN. Hazra1 aM. Gulliford00aEvolution of the "fourth stage" of epidemiologic transition in people aged 80~years and over: population-based cohort study using electronic health records  a180 v15  a1478-7954