Document is current

Article History

First Online: 7 January 2020

Compliance with Ethical Standards

:

: One of the authors receives royalties from Routledge Publishing outside the submitted work. The other authors declare that they have no conflicts of interest to disclose.

: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

: Informed consent was obtained from all individual participants included in the study.