{
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  "definition" : "Differences between groups at start of trial may confound or bias the findings.",
  "system" : "http://hl7.org/fhir/evidence-classifier-code",
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  "concept_id" : "9a829a34-5a9c-5e4c-a763-e5f567e0269b",
  "ancestors" : {
    "BaselineImbalance" : 0
  },
  "id" : "a66242a1-db58-424c-b0a8-8a06d1bfba6a",
  "code" : "BaselineImbalance",
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}