**Acknowledgements**

Part of this work was presented during the sessions of International Conference on Business & Economics, Athens, Greece, 2018, available at shttp://icbe-hou.eap.gr › public › program-en\_US. Special thanks to Professors Theodoros N. Sergentanis and Maria Trigoni, Management of Health Care Services, Hellenic Open University, Patras, Greece, for guidance and inspiration. The author received no financial support for the research, authorship, and publication of this article.
