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BMC Public Health > 2019 > 19 > 1 > 1-13
European Journal of Nutrition > 2019 > 58 > 4 > 1569-1578
BMC Public Health > 2015 > 15 > 1 > 1-6
Zeitschrift für Gerontologie und Geriatrie > 2008 > 41 > 3 > 208-216
Journal of General Internal Medicine > 2001 > 16 > 11 > 721-727