| Autor: |
Alfaleh AF; Research and Planning Unit, General Directorate of School Health, Ministry of Health, Riyadh, KSA., Alkattan AN; Research and Planning Unit, General Directorate of School Health, Ministry of Health, Riyadh, KSA., Alzaher AA; Research and Planning Unit, General Directorate of School Health, Ministry of Health, Riyadh, KSA., Sagor KH; Research and Planning Unit, General Directorate of School Health, Ministry of Health, Riyadh, KSA., Ibrahim MH; Department of Community, Environmental and Occupational Medicine, Faculty of Medicine, Zagazig University, Zagazig, Egypt. |
