Cohort Profile: The 1895, 1905, 1910 and 1915 Danish Birth Cohort Studies - secular trends in the health and functioning of the very old. (22nd April 2017) - Rasmussen, Signe Høi; Andersen-Ranberg, Karen; Thinggaard, Mikael; Jeune, Bernard; Skytthe, Axel; Christiansen, Lene; Vaupel, James W; McGue, Matt; Christensen, Kaare