TSUJI, I. Impact of walking upon medical care expenditure in Japan : the Ohsaki Cohort Study. Int J Epidemiol. 2003, 32, 809-814
ROOS, NP. Predictors of successful aging : A twelveyear study of Manitoba elderly. Am J Public Health. 1991, 81, 63-68
WOLINSKY, FD. Perceived health status and mortality among older men and women. J Gerontology : Social Sciences. 1992, 47, S304-S312
CHIPPERFIELD, JG. Methods and description of the Aging in Manitoba Project : A 20-year longitudinal study. Can J Aging. 1997, 16, 606-625
MENEC, VH. The interactive effects of perceived control and functional status on health and mortality among the young-old and old-old. J Gerontology : Psychological Sciences, B. 1997, 52, 118-126