TY - JOUR A1 - McGue, M. A1 - Vaupel, J.W. A1 - Holm, N. A1 - Harvald, B. T1 - Longevity is moderately heritable in a sample of Danish twins born 1870-1880 Y1 - 1993 JF - Journals of Gerontology: Series A - Biological Sciences and Medical Sciences VL - 48 IS - 6 SP - B237 EP - -B244 ER -