Shlaka, Hussein Riyadh Ali Shnain Al-Abbas, Wijdan Dhaidan , Department of Basic Science, Faculty of Nursing, University of Kufa Shwalla, Ahmed Jassim , Najaf Education Directorate Shwayel, Ameer Jabbar Siburian, Reynold , Faculty of Medicine, Sriwijaya University, Palembang Sim, Un-Rim, Pyongyang University of Medical Sciences, Pyongyang, Democratic People’s Republic of Korea. Sin, Ki Chol, Haeju College of Medical Sciences Sin, Ye Song , Department of Dental Caries and Oral Medicine Research, Faculty of Dentistry, Pyongyang University of Medical Sciences, Pyongyang, Democratic People’s Republic of Korea. Sin, Yong Chan, Okryu Children's Hospital, Ministry of Public Health. Democratic People’s Republic of Korea. Singh, Dr. Susanchita , Private Dental Practitioner, India. Soghi, Ahlam Ali Son, Il Su, ICU, Pyongyang General Hospital, Pyongyang, Democratic People′s Republic of Korea. Son, Jong A , Pyongyang University of Medical Sciences, Pyongyang, Democratic People’s Republic of Korea. Son, Man Bok , Department of Dental Caries and Oral Medicine Research, Faculty of Dentistry, Pyongyang University of Medical Sciences, Pyongyang, Democratic People’s Republic of Korea. Son, Man-Bok , Department of Dental Caries and Oral Medicine Research, Pyongyang University of Medical Sciences, Pyongyang, Democratic People’s Republic of Korea. Song, Song-Il , Pyongyang University of Medical Sciences, Ryonhwa-dong, Central District, Pyongyang, Democratic People’s Republic of Korea. Song, Yong Su , Institute for Infection Control, Faculty of Hygiene, Pyongyang University of Medical Sciences, Democratic People’s Republic of Korea. Song, Yong Su, Scientific Research Department, Pyongyang University of Medical Sciences, Democratic People’s Republic of Korea. Suhail, Ammar A., Medical Laboratory Techniques, Al-Zahrawi University College, Karbala, Iraq