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. 2022 Dec 2;62(3):1059–1076. doi: 10.1007/s00394-022-03054-z

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Fig. 7 — Risk of bias. D1 Randomization process, D2 Deviations from the intended interventions, D3 Missing outcome data, D4 Measurement of the outcome, D5 Selection of the reported results. + : Low risk of bias, ! : Some concerns in risk of bias, − : High risk of bias