Author contributions:
Abdalla M Fayyad: Conceptualization; Data curation; Formal analysis; Methodology; Roles/Writing-original draft; Writing-review & editing.
Moath R Hasan: Conceptualization; Data curation; Formal analysis; Methodology; Roles/Writing-original draft; Writing-review & editing.
Disclosure statement: The authors report no conflict of interest.
Sources of financial support: None.