1. YueTai Medical Treatment (Shandong) Limited Company, Taian 253000, China
2. School of Insurance and Economics, University of International Business and Economics, Beijing 100029, China
3. Department of Agricultural Business and Economics, Institute of Agricultural and Food Economics, Hungarian University of Agriculture and Life Sciences, 2100 Budapest, Hungary
4. Faculty of Agriculture, University of Science and Technology, Aliero 863102, Nigeria
5. Hungarian National Bank–Research Center, John von Neumann University, 6000 Kecskemét, Hungary
6. College of Business and Economics, University of Johannesburg, Johannesburg 2006, South Africa