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. 2021 Aug 14;14(8):800. doi: 10.3390/ph14080800

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Flowchart describing the study design and intervention. SCID-5: Structured Clinical Interview for DSM-5; BMI: body mass index; EPQ: Eysenck personality questionnaire; BDI: Beck depression inventory; IQ estimate: Spot-the-word test; BFS: Befindlichkeitsskala; PANAS: positive and negative affect schedule; STAI: state-trait anxiety inventory; SHAPS: Snaith-Hamilton pleasure scale; TEPS: Temporal experience of pleasure scale; OXH: Oxford happiness questionnaire; QUIP: questionnaire for impulsive-compulsive disorders in Parkinson’s disease-rating Scale; ETB: Emotional Test Battery; ASL: arterial spin labelling.