1. Department of Medicine, School of Medicine, Nazarbayev University, Kerey and Zhanibek Khans St 5/1, Astana City 010000, Kazakhstan
2. Department of Biomedical Sciences, Nazarbayev University, Kerey and Zhanibek Khans St 5/1, Astana City 010000, Kazakhstan
3. Education Department, Corporate Fund University Medical Center, Astana City, Kazakhstan
4. Department of Epidemiologic Control, Corporate Fund University Medical Center, Astana City, Kazakhstan