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Jigsaw Puzzles As Cognitive Enrichment (PACE) - the effect of solving jigsaw puzzles on global visuospatial cognition in adults 50 years of age and older: study protocol for a randomized controlled trial.
Fissler P, Küster OC, Loy LS, Laptinskaya D, Rosenfelder MJ, von Arnim CAF, Kolassa IT. Fissler P, et al. Among authors: loy ls. Trials. 2017 Sep 6;18(1):415. doi: 10.1186/s13063-017-2151-9. Trials. 2017. PMID: 28877756 Free PMC article. Clinical Trial.