University of Minnesota, USA
East China University of Science and Technology, China
Policlinico Universitario A. Gemelli Foundation, Italy
Peking Union Medical College Hospital, China
Peloponnese University, Greece
University of Catania, Catania, Italy
Department of Oral and Maxillofacial Surgery, Rural Dental College, India
Makerere University College of Health Sciences, Uganda
Tabriz University of Medical Science, Iran
Zagazig University, Egypt
Shiraz university of medical sciences, Iran
Department of Oral and Maxillofacial Surgery, Usmanu Danfodiyo University Teaching Hospital, Sokoto, Nigeria
School of Medicine, Makerere University College of Health Sciences, Uganda
King Faisal/Al-Azhar Universities, Saudi Arabia
University of Aleppo, Syria
Guizhou Medical University, China