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Waller, Katja, et al. "Long-term Leisure-time Physical Activity and Other Health Habits As Predictors of Objectively Monitored Late-life Physical Activity – A 40-year Twin Study." Sci Rep 2018.

Waller, Katja, et al. "Long-term Leisure-time Physical Activity and Other Health Habits As Predictors of Objectively Monitored Late-life Physical Activity – A 40-year Twin Study." Sci Rep 2018.