1. Department of Heart Disease; Institute of Medicine; Haukeland University Hospital; Bergen Norway
2. Department of Otolaryngology and Head and Neck Surgery; Haukeland University Hospital; Bergen Norway
3. Department of Oncology and Medical Physics; Haukeland University Hospital; Bergen Norway
4. Department of Pathology; Haukeland University Hospital; Bergen Norway
5. The Gade Institute Section for Pathology; Haukeland University Hospital; Bergen Norway