. 2021 Jul 29;8:662310. doi: 10.3389/fnut.2021.662310
Copyright © 2021 Koppold-Liebscher, Klatte, Demmrich, Schwarz, Kandil, Steckhan, Ring, Kessler, Jeitler, Koller, Ananthasubramaniam, Eisenmann, Mähler, Boschmann, Kramer and Michalsen.
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Figure 1.
A flow chart of visits with participant numbers.