[1] Univ Copenhagen, Sect Social Med, Dept Publ Hlth, Fac Hlth & Med Sci, Oster Farimagsgade 5, Copenhagen 1014 K, Denmark
[2] Univ Copenhagen, Ctr Hlth Aging, Fac Hlth & Med Sci, Blegdamsvej 3B, Copenhagen 2200 N, Denmark
[3] Univ Copenhagen, Sect Hlth Serv Res, Dept Publ Hlth, Fac Hlth & Med Sci, Oster Farimagsgade 5, Copenhagen 1014 K, Denmark