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      "linked_annotation_ids": []
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      "activity_id": "act-003",
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      "linked_annotation_ids": []
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    {
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      "linked_annotation_ids": []
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      "linked_annotation_ids": []
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      "linked_annotation_ids": []
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      "linked_annotation_ids": []
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    {
      "activity_id": "act-003",
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      "linked_annotation_ids": []
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      "call_made": "Appendix 2 (Days 3–28) and Appendix 3 (After Day 28) are each typed main_soa: sequential, independently structured schedules for the same participants, like separate Screening and Treatment tables.",
      "alternative": "Type Appendix 2 and/or Appendix 3 as track (same participants in a different study phase, own visit structure) with a short track_label such as 'Days 3–28' / 'After Day 28'.",
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      "alternative": "Type the band as epoch (follow-up phase vs completion) or as visit (the last cell names a visit).",
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