Study included in this review has to meet all of the following inclusion criteria in the PICOS order:
population: patients with COVID-19;
intervention group (group 1): routine treatment with additional CBT;
comparison group (group 2): routine treatment;
outcome measures: any rating scale describing stress, mood, and quality of life;
study design: randomized controlled trial or observational study.
Biomechanical studies, in vitro studies, review articles, techniques, case reports, letters to the editor, and editorials are excluded.
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