1. Department of Health Policy and Management, School of Public Health, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia; Faculty of Economy and Business Sciences, University of Sannio, Benevento, Italy
2. Department of Health Policy and Management, School of Public Health, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia; The Institute of Public Health and Clinical Nutrition, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
3. Department of Business Management, Ulaanbaatar University, Ulaanbaatar, Mongolia
4. Department of Engineering, University of Sannio, Benevento, Italy
5. Faculty of Economy and Business Sciences, University of Sannio, Benevento, Italy