Authors:
Pitkala, KH
Valvanne, J
Kulp, S
Strandberg, TE
Tilvis, RS
Citation: Kh. Pitkala et al., Secular trends in self-reported functioning, need for assistance and attitudes towards life: 10-year Differences of three older cohorts, J AM GER SO, 49(5), 2001, pp. 596-600
Authors:
Arve, S
Tilvis, RS
Lehtonen, A
Valvanne, J
Sairanen, S
Citation: S. Arve et al., Coexistence of lowered mood and cognitive impairment of elderly people in five birth cohorts, AGING-CLIN, 11(2), 1999, pp. 90-95