Add Use Case CASUS

USe of HIFIS in CASUS in general (CASUS Part one)

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_posts/2022/08/2022-08-04-use-case-casus.md

+---
+title: "Use Case CASUS"
+title_image: globe.jpeg
+data: 2022-08-01
+authors:
+  - klaffki
+layout: blogpost
+categories:
+  - Use Case
+
+excerpt: >
+    tbd
+---
+
+## tbd