The Odense University Hospital (OUH), established in 1912, is of major regional importance, not only for healthcare, but for conducting research in collaboration with the Institute of Clinical Research of the University of Southern Denmark. OUH is the largest hospital unit in Denmark and the largest employer in Odense, and as of 2006 it had 1200 beds and a staff of 7700 people, of which 1300 people were doctors. Today there are about 10,000 employees covering all fields of medicine. The hospital tower block is high, has 15 floors and is Odense's tallest building. It is the principal hospital for the northern part of Funen but also takes patients from all over Denmark, as it has highly specialized units within hand replantation surgery and special neuro-radiological intervention.