Contributors GHA and NB helped conceive the study; GHA, NB, MK and VV
conceived the study design. GHA and MK helped draft the protocol. LP
developed and executed the search strategy and edited the draft protocol. All
authors helped editing the draft protocol, read and approved the final
Funding This research was supported through a Cancer Care Ontario
research grant and Canadian Cancer Society Research Institute award (grant
Competing interests NB holds the Cancer Care Ontario Health Services
Provenance and peer review Not commissioned; externally peer reviewed.
Data sharing statement Unpublished study data such as the search
strategies for the other databases (EMBASE, CINAHL, PsycINFO, SSA) are
available on request to the corresponding author.
Open Access This is an Open Access article distributed in accordance with
the Creative Commons Attribution Non Commercial (CC BY-NC 3.0) license,
which permits others to distribute, remix, adapt, build upon this work non-
commercially, and license their derivative works on different terms, provided
the original work is properly cited and the use is non-commercial. See: http://
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