1. Department of Clinical Pathology, Mother and Child Health Care Institute of Serbia Dr Vukan Cupic, Belgrade, Serbia
2. Banjaluka University School of Medicine, Banjaluka, Bosnia and Herzegovina
3. Department of Otorhinolaryngology, Mother and Child Health Care Institute of Serbia Dr Vukan Cupic, Belgrade, Serbia
4. Department of Dermatopathology, St John's Institute of Dermatology, St Thomas' Hospital, London, United Kingdom