1. Doctoral Program, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
2. Department of Oral Biology, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
3. Oral Medicine Study Program, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
4. Department of Oral Medicine, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
5. Bachelor of Dental Science Program. Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
6. Department of Oral and Dental Medicine, Faculty of Medicine, Taiz University, Taiz, Yemen
7. Faculty of Oral and Dental Medicine, Al-Saeed University, Taiz, Yemen