Declarations:
Conflict of Interest: The authors declare that they have no conflict
of interest.
Authors’ contributions : Dr. Omar Saleh: Has designed the study
methodology, did the statistical analysis and participated in article
writing. Prof. Fathy Maklady Supervised designing the study,
implementing governmental approvals for data collection, supervised
data analysis and revised the article writing. Dr. Ahmed Fareed,
designed the working protocol, did the data collection and data
analysis and wrote the article. All authors read and approved the
final manuscript.