urn:ddi:int.naddi:f4882ecc-2af5-41b0-8910-53fcef1fc3c2:2 int.naddi f4882ecc-2af5-41b0-8910-53fcef1fc3c2 2 jeremy thu_dats urn:ddi:int.naddi:bf8cd025-e5d8-4fd7-9d44-4351474024a4:2 int.naddi bf8cd025-e5d8-4fd7-9d44-4351474024a4 2 thu_dats DDI to DATS: ICPSR Metadata in the DataMed Portal int.naddi e1914a77-c0d4-4fd4-b22e-64bd3d23113f 1 CodeList