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Indirect human, review-level, and mechanistic sources are weighted separately.","doi":null,"risk_of_bias":"not appraised in public sidecar","directness":"citation"},{"study":"**Directional signal** is counted within the assigned outcome class only. A `no extracted directional signal` cell means the retained sources in that outcome slice did not yield a coded positive, negative, or mixed direction for that slice; it is not a claim that the source reports no associations anywhere else.","doi":null,"risk_of_bias":"not appraised in public sidecar","directness":"citation"},{"study":"**Evidence tier** follows the deterministic tier/directness taxonomy used in the source builder; the prose writer cannot move a source between classes after sources are frozen.","doi":null,"risk_of_bias":"not appraised in public sidecar","directness":"citation"},{"study":"Effect of Inspiratory Muscle 2026","doi":null,"risk_of_bias":"not appraised in public sidecar","directness":"citation"},{"study":"Predictive Factors for Occlusal 2026","doi":null,"risk_of_bias":"not appraised in public sidecar","directness":"citation"},{"study":"WHO 2000","doi":null,"risk_of_bias":"not appraised in public sidecar","directness":"citation"}]}