Authors’ contributions
All the authors made substantial contributions to the manuscript. The study concept and design were developed by Joanne Shaw, Phyllis Butow, Heather Shepherd, and Mona Faris. Data extraction and preparation was performed by Mona Faris. Statistical analyses were performed by Mona Faris, Patrick Kelly, and Joanne Shaw. The first draft of the manuscript was written by Mona Faris. The manuscript was edited by all authors. All authors have reviewed and approved the final manuscript submitted for publication.