Acknowledgements
We acknowledge the Qatar National Library for funding the open access
publication of this article. We also acknowledge the Medical Research
Center at Hamad Medical Corporation for their support.
Declaration: This manuscript is original work and has
not been submitted or is not under consideration for publication
elsewhere. All the authors have reviewed the manuscript and approved it
before submission. None of the authors have any conflict of
interest from publishing this work.
Name of Department and Institution where work was done: Department of
Oncology, National Center for Cancer Care & Research, Hamad Medical
Corporation, Doha, Qatar