{
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  "definition" : "A person has expressed an interest in being in a study but has not yet been through any assessment or consent processes.",
  "system" : "http://terminology.hl7.org/CodeSystem/research-subject-milestone",
  "property" : [ ],
  "codesystem" : "44c939b1-933f-5461-988e-1c176f91b64f",
  "concept_id" : "b5c00fbd-d894-5dbc-8c83-a29adc448be5",
  "ancestors" : {
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  },
  "id" : "8fac80ab-6593-4af0-8011-2927890971a0",
  "code" : "SignedUp",
  "display" : "Signed up",
  "version" : "1.0.1"
}