**Acknowledgements**

We would like to thank L'Oréal-UNESCO (FWIS) for their support through a Middle East Fellowship Award (2017) to Dr. Amal Qattan, PhD.-

**Figure 1** reprinted and adapted with permission from Qattan etal. [3]. Copyright (2017) BMC Cancer Research.

#### **Conflict of interest-**

The authors declare that they have no competing interest.
