Acknowledgements
DFW acknowledges salary support from a Tier 1 Canada Research Chair.
Disclosures
DFW has nothing to disclose.
Statement of Authorship
DFW is the sole author of this submission. He conceived it, and wrote it in full.
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Published online by Cambridge University Press: 28 January 2019
DFW acknowledges salary support from a Tier 1 Canada Research Chair.
Disclosures
DFW has nothing to disclose.
Statement of Authorship
DFW is the sole author of this submission. He conceived it, and wrote it in full.