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. 2019 Jun 21;21(6):e14265. doi: 10.2196/14265

Figure 4.

Figure 4

Flowchart with combinations of persuasive system design (PSD) principles used in weight loss maintenance (WM) interventions 1-11. Illustrates the number (n) of WM interventions applying the PSD principles combined with previous principles to the left in the flowchart.