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            "text": "This is a biologically plausible model, but it has not been proven specifically for residential proximity to industrial complexes. (Nor has it been disproven, perhaps)"
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            "text": "Environmental conditions that could theoretically contribute\n1. Chronic environmental noise"
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            "text": "Industrial complexes may generate:",
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                    "text": "Continuous mechanical noise",
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                    "text": "Intermittent alarms",
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                    "text": "Rail-yard operations",
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                    "text": "Heavy truck traffic",
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                    "text": "Loading and unloading activities",
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                    "text": "The best-supported pathway is likely:"
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            "text": "Industrial noise[p17.5.1] chronic sleep disruption + physiological stress[p17.5.2] lower migraine threshold[p17.5.3] possible increased long-term susceptibility.",
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                    "text": "→",
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                        "bbox_estimated": true
                    }
                },
                {
                    "id": "p17.5.2",
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                    "text": "→",
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                        "text_span": 9,
                        "bbox_estimated": true
                    }
                },
                {
                    "id": "p17.5.3",
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                    "text": "→",
                    "attrs": {
                        "inline": true,
                        "text_offset": 107,
                        "text_span": 9,
                        "bbox_estimated": true
                    }
                }
            ]
        },
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            "text": "Industrial and environmental noise is well established as a cause of annoyance and sleep disturbance, with growing evidence for broader health effects. (Source: ChatGPT with link to PubMed source)"
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            "text": "AIR POLLUTION",
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            "level": 3
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            "text": "Large industrial facilities may emit varying amounts of:"
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                    "text": "PM_{2.5}",
                    "marker": "-"
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                {
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                    "text": "PM_{10}",
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                    "text": "Nitrogen oxides",
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                {
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                    "order": 23,
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                    "text": "Sulfur dioxide",
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                    "text": "Volatile organic compounds",
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                {
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                    "text": "Ozone precursors",
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            "text": "Systematic reviews have found that several outdoor pollutants are associated with increased migraine-related outcomes, although effect sizes vary and causality has not been established."
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        {
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            "order": 27,
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            "text": "A plausible sequence is:",
            "level": 3
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            "text": "Page 17 of 113",
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