1. Saib Suwilo, (Scopus ID = 6504683544)Universitas Sumatera Utara, Indonesia
2. Tracey Muir, (Scopus ID = 24376940600)University of Tasmania, Hobart, Australia
3. Burcu Gurbuz, (Scopus ID = 36864011800)Uskudar University, Turkey
4. Sutarman Sutarman, (Scopus ID = 55964801300)Universitas Sumatera Utara, Indonesia
5. Anton Abdul Basahkamil, (Scopus ID = 24481107300)Istanbul Gelisim University, Turkey
6. Dorien J Detombe, (Scopus ID = 6603137867)Sichuan University, Netherlands
7. Masaji Watanabe, (Scopus ID = 7405488766)Okayama University, Indonesia