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Contributors Both authors contributed to the design, analysis and interpretation of the findings. The first author (DAR) wrote the first draft. Both authors approved the final submitted version.
Funding This project was supported by the Canada Research Chair in Medical Decision Sciences and the Canadian Institutes of Health Research.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
Author note Crowdsourcing provides a practical method to support hand hygiene by allowing outpatients, families, visitors, staff, volunteers and other to notify hospital support services about empty hand sanitizer dispensers that requires refilling.