1. Department of Neurology, Ophthalmology and Otolaryngology, Semey Medical University, Semey, Kazakhstan
2. CONEM Kazakhstan Environmental Health and Safety Research Group, Semey Medical University, Semey, Kazakhstan
3. Department of Emergency Medicine, Semey Medical University, Semey, Kazakhstan
4. Department of Epidemiology, Biostatistics & Evidence Based Medicine, Al-Farabi Kazakh National University, Almaty, Kazakhstan
5. Head Office, Semey Medical University, Semey, Kazakhstan
6. Council for Nutritional and Environmental Medicine (CONEM), Mo i Rana, Norway