1. Department of Radiology; Sidra Medical and Research Center; Doha Qatar
2. Department of Anaesthesia; Royal Aberdeen Children's Hospital; Aberdeen UK
3. Visiting Consultant; KK Women's & Children's Hospital; Singapore Singapore
4. Department of Anaesthesia; Center of Head and Orthopaedics; Section for Anaesthesia for ENT-, Head-, Neck- and Maxillofacial Surgery; Rigshospitalet, University Hospital of Copenhagen; Copenhagen Denmark