Reference: Trajectories of occupational physical activity and risk of later-life mild cognitive impairment and dementia: the HUNT4 70+ study by Ekaterina Zotcheva, Bernt Bratsberg, Bjrn Heine Strand, Astanand Jugessur, Bo Lars Engdahl, Catherine Bowen, Geir Selbk, Hans-Peter Kohler, Jennifer R.