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Footnotes
Handling editor Anna Maria Geretti
Contributors ASA oversaw data collection and analysis of the 2018 survey and drafted the manuscript. HM facilitated data collection for the 2018 survey and provided critical feedback on the final manuscript. JHV initiated the project, oversaw data collection and analysis of the survey in 2012, and contributed to and provided critical feedback on the manuscript.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned; internally peer reviewed.
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