| Michal Rehor | Brown Coal Research Institute, CZ |
| Kc Bloom | Salem State University, US |
| Mark W. Berry | Los Angeles Center for Integrated Medicine a Division of Deltamed, US |
| Babu George | University of Southern Mississippi, US |
| Ladan Rokni | Konkuk University, |
| Himanshu Talwar | Fhrai Institute of Hospitality and Management, IN |
| Nawarat Kaew-On | Restaurateurs Sans Frontières, Rbd Co., Ltd, TH |
| Ahmed Hasanein | Helwan University, EG |
| Eleni Alexiou | University of Aegean, GR |
| Daniel Anthoni Sihasale | University of Pattimura, ID |
| Marco Camilli | Nelia Consulting, IT |
| Rui Alexandre Castanho | University of the Azores, PT |
| Ahmad Albattat | Management and Science University, MY |
| Simone Putrick | University Federal of Parnaiba Delta, BR |
| Eriks Lingeberzins | Turiba University, LV |
| Eid Alotaibi | University of Hail, SA |
| Durdana Ahmed Ali Khan | Commecs College, PK |
| Sabry El Azazy | Egyptian Higher Institute for Tourism and Hotels, EG |
| Narayana Bhat | Kuwait Institute for Scientific Research, KW |
| Adela Balderas Cejudo | University of Oxford, ES |
| Chigozie Odum | University of Nigeria Nsukka, NG |
| Jannat Ara Parveen | University of Chittagong, BD |
| Krishnanand No Surname | University of Delhi, IN |
| Kojo Yeboah Gyabaah | University of Education, Winneba, GH |
| Moges Woldu | Mekelle University, ET |
| Noelah Mae Borbon | Lyceum of the Philippines University Batangas, PH |
| Wijitapure Wimalaratana | University of Colombo, LK |
| Georgia Papadopoulou | Al Ghurair University, AE |
| Reza Dehghan | International Health Tourism and Business Federation (utsaf), IR |
| Federica Ribera | University of Salerno, IT |
| Juliana Alencar | Professor at Technology College of the São Paulo State - Fatecsp, Postdoctoral Researcher at the Architecture and Urbanism College, São Paulo University - Fauusp, Researcher Phd in Civil Engineering, Polytechnic School, São Paulo University - Epusp, BR |
| Norunnajjah Ahmat | Technical University of Malaysia Melaka, MY |
| Normah Abdul Latip | Universiti Sains Malaysia, MY |
| Ning Niu | University of Syndey, AU |
| Michael Anastasiou | Internapa College, CY |
| chenini abderrahim | University of Ghardaia, DZ |
| Nick Naumov | University of Northampton, GB |
| Ma. Pagasa Nanette Rotairo | University of the East, PH |
| Oldemar Carvalho Junior | Ekko Brasil Institute, BR |
| Virginia Santamarina | Polytechnic University of Valencia, ES |
| Omar Jawabreh | The University of Jordan, JO |
| G. Fabiola Safonte | University of Catania, IT |
| Mana Khoshkam | Islamic Azad University, IR |
| Md.asif Iqubal | Fiji National University, FJ |
