Acknowledgments
I thank my colleagues Nanina Brehm and Reinhart A. Sweeney for helpful comments on an initial draft of this manuscript.
Declaration of Interest
The author has no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.