1. Department of International Public Health, Norwegian Institute of Public Health, Oslo, Norway
2. Northern State Medical University, Arkhangelsk, Russia
3. North-Eastern Federal University, Yakutsk, Russia
4. Kazakh National Medical University, Almaty, Kazakhstan
5. Semey State Medical University, Semey, Kazakhstan
6. Arkhangelsk Regional Clinical Oncological Dispensary, Arkhangelsk, Russia