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    {
      "id": "Treatment",
      "label": "Treatment",
      "color": "series.blue"
    },
    {
      "id": "Control",
      "label": "Control",
      "color": "series.red"
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  ],
  "calculation": {
    "domain": {
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    "margin": {
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      "right": 36,
      "bottom": 76,
      "left": 96
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    "minimumPlotHeight": 30
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    "cap": "round",
    "join": "miter"
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  "censor": {
    "visible": true,
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    "width": 2
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    "yTicks": 5,
    "xTitle": "Time (months)",
    "yTitle": "Survival Probability",
    "percentDecimals": 0
  },
  "legend": {
    "position": "right",
    "interactive": true
  },
  "annotations": [],
  "interaction": {
    "tooltip": true,
    "radius": 6,
    "probabilityDecimals": 1
  },
  "document": {
    "header": {
      "title": "Kaplan-Meier Curve",
      "subtitle": "At 30 months 62% of the treatment group survives against 27% of the control"
    },
    "footer": {
      "source": "xarts · demo data",
      "notes": "Illustrative data to explore the chart and replace with your own."
    },
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      "minimumTextGap": 4
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    "locale": "en-US",
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}