Dr. Christopher S. Kovacs - Endocrinologist  
What Is The CIU?
The Clinical Investigation Unit is no longer an inpatient unit; instead, it deals entirely with outpatient tests such as pituitary stimulation tests, described in the section entitled Outpatient Endocrine Tests.

Thyroid cancer patients requiring radioiodine ablation are still admitted to hospital but the original CIU - which provided inpatient management of diabetes and other endocrine problems - no longer exists.