1. Faculty of Natural Sciences and Health Care, Shota Rustaveli State University, Batumi, Georgia
2. Maternity and Child Health Center, Batumi, Georgia
3. Canadian Centre for Health and Safety in Agriculture, College of Medicine, University of Saskatchewan, Saskatoon, Canada
4. Department of Epidemiology, School of Medicine in Katowice, Medical University of Silesia, Katowice, Poland