1. Strangeways Research Laboratory, Thyroid Carcinogenesis Research Unit, Worts Causeway, Cambridge, United Kingdom.
2. MRRC RAMS, Obninsk, Russian Federation.
3. Institute of Endocrinology and Metabolism, Kiev, Ukraine.
4. Research Institute for Radiation Medicine and Clinical Endocrinology, Minsk, Belarus.
5. Research Laboratory, National Nagasaki Medical Centre, Omura, Japan.
6. Department of Pathology and Laboratory Medicine, University of Pennsylvania Medical Centre, Philadelphia, Pennsylvania.
7. Departimento di Patologia, Instituto Nazionale Tumori, Milano, Italy.
8. Department of Public Health and Primary Care, Centre for Applied Medical Statistics, Institute of Public Health, University of Cambridge, Cambridge, United Kingdom.
9. Imperial College Histopathology Department, Hammersmith Hospital, London, United Kingdom.