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. 2018 Oct 1;10:299. doi: 10.3389/fnagi.2018.00299

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Copyright © 2018 Fissler, Küster, Laptinskaya, Loy, von Arnim and Kolassa.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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CONSORT flow chart. ^aCompleted at least 24 days with a minimum of 45 min and at least three of four cognitive health counseling sessions, ^bcompleted at least three of four cognitive health counseling sessions, and ^cparticipants reported solving jigsaw puzzles in the intervention period.