{
  "package" : "us.nlm.vsac@0.21.0",
  "definition" : null,
  "system" : "https://www.cdc.gov/nhsn/cdaportal/terminology/codesystem/cdcnhsn.html",
  "property" : [ ],
  "codesystem" : "078444ba-7844-5424-a8ae-aaa5dd3908d0",
  "concept_id" : "daae6fba-1657-5219-b4d4-d2a1c52903d8",
  "ancestors" : {
    "1334-2" : 0
  },
  "id" : "b29520f1-79cc-4b73-a16b-6285cb9995eb",
  "code" : "1334-2",
  "display" : "Extremely preterm (<28 weeks)",
  "version" : "2023-04"
}