Article Info Authors Dr.Sultan Khalid AldahashDr.Shady Abdulrahman KamelDr.Asmma Awwad M. AlQusibri Volume: 25 Year: 2018 Month: January Issue: 1-4 Pages: Reference: Aldahash S., Kamel S., AlQusibri A., .Saudi Epidemiology Bulletin. 2018;25(1-4):.